/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/array-examples/standard_two_index_07.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:08:56,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:08:56,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:08:56,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:08:56,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 18:08:56,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 18:08:56,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 18:08:56,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 18:08:56,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 18:08:56,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 18:08:56,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 18:08:56,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 18:08:56,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 18:08:56,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 18:08:56,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 18:08:56,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 18:08:56,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 18:08:56,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:08:56,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:08:56,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:08:56,370 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 18:08:56,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:08:56,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:08:56,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:08:56,384 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:08:56,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:08:56,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:08:56,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:08:56,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:08:56,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:08:56,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:08:56,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:08:56,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:08:56,386 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:08:56,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:08:56,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:08:56,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:08:56,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:08:56,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:08:56,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:08:56,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:08:56,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:08:56,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:08:56,387 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:08:56,387 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:08:56,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:08:56,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:08:56,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:08:56,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:08:56,649 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:08:56,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i [2022-01-31 18:08:56,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1491fff0f/c8b6d6cab33a472aa6627832feda8be1/FLAG932784ed9 [2022-01-31 18:08:57,069 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:08:57,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_07.i [2022-01-31 18:08:57,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1491fff0f/c8b6d6cab33a472aa6627832feda8be1/FLAG932784ed9 [2022-01-31 18:08:57,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1491fff0f/c8b6d6cab33a472aa6627832feda8be1 [2022-01-31 18:08:57,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:08:57,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:08:57,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:08:57,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:08:57,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:08:57,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a027a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57, skipping insertion in model container [2022-01-31 18:08:57,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:08:57,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:08:57,635 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_07.i[814,827] [2022-01-31 18:08:57,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:08:57,658 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:08:57,670 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_07.i[814,827] [2022-01-31 18:08:57,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:08:57,696 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:08:57,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57 WrapperNode [2022-01-31 18:08:57,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:08:57,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:08:57,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:08:57,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:08:57,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:08:57,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:08:57,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:08:57,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:08:57,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (1/1) ... [2022-01-31 18:08:57,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:08:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:08:57,777 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) [2022-01-31 18:08:57,787 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 [2022-01-31 18:08:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:08:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:08:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:08:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:08:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:08:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:08:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:08:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:08:57,811 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:08:57,812 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:08:57,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:08:57,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:08:57,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:08:57,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:08:57,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:08:57,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:08:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:08:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:08:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:08:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:08:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:08:57,891 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:08:57,893 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:08:57,994 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:08:57,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:08:58,000 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 18:08:58,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:08:58 BoogieIcfgContainer [2022-01-31 18:08:58,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:08:58,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:08:58,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:08:58,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:08:58,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:08:57" (1/3) ... [2022-01-31 18:08:58,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac6126f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:08:58, skipping insertion in model container [2022-01-31 18:08:58,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:08:57" (2/3) ... [2022-01-31 18:08:58,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac6126f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:08:58, skipping insertion in model container [2022-01-31 18:08:58,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:08:58" (3/3) ... [2022-01-31 18:08:58,013 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2022-01-31 18:08:58,018 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:08:58,018 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:08:58,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:08:58,056 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=JORDAN [2022-01-31 18:08:58,056 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:08:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 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) [2022-01-31 18:08:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 18:08:58,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:58,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:58,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash 840989783, now seen corresponding path program 1 times [2022-01-31 18:08:58,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:58,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825976130] [2022-01-31 18:08:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:58,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:58,157 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:58,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:58,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:58,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825976130] [2022-01-31 18:08:58,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825976130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:58,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:58,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:08:58,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791656232] [2022-01-31 18:08:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:58,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:08:58,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:08:58,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:08:58,382 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 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 3.6666666666666665) internal successors, (11), 2 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) [2022-01-31 18:08:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:58,440 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-01-31 18:08:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:08:58,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 [2022-01-31 18:08:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:58,452 INFO L225 Difference]: With dead ends: 41 [2022-01-31 18:08:58,452 INFO L226 Difference]: Without dead ends: 19 [2022-01-31 18:08:58,454 INFO L932 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 [2022-01-31 18:08:58,460 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 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 [2022-01-31 18:08:58,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:08:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-31 18:08:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-31 18:08:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-31 18:08:58,495 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-01-31 18:08:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:58,496 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-31 18:08:58,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2022-01-31 18:08:58,496 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-31 18:08:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 18:08:58,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:58,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:58,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:08:58,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash -519126957, now seen corresponding path program 1 times [2022-01-31 18:08:58,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:58,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486142129] [2022-01-31 18:08:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:58,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:58,509 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:58,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:58,602 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:58,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486142129] [2022-01-31 18:08:58,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486142129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:58,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:58,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:08:58,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681354148] [2022-01-31 18:08:58,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:58,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:08:58,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:58,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:08:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:08:58,605 INFO L87 Difference]: Start difference. First operand 19 states and 21 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) [2022-01-31 18:08:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:58,658 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-31 18:08:58,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 18:08:58,659 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 [2022-01-31 18:08:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:58,661 INFO L225 Difference]: With dead ends: 32 [2022-01-31 18:08:58,661 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 18:08:58,662 INFO L932 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 [2022-01-31 18:08:58,663 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:58,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:08:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 18:08:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 18:08:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 18:08:58,677 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2022-01-31 18:08:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:58,678 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 18:08:58,678 INFO L471 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) [2022-01-31 18:08:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 18:08:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 18:08:58,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:58,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:58,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:08:58,680 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1970595897, now seen corresponding path program 1 times [2022-01-31 18:08:58,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:58,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817954326] [2022-01-31 18:08:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:58,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:58,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:58,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:58,704 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:58,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:58,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817954326] [2022-01-31 18:08:58,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [817954326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:58,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:58,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:08:58,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952982434] [2022-01-31 18:08:58,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:58,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:08:58,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:58,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:08:58,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:08:58,799 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:58,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:58,878 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-01-31 18:08:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:08:58,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 18:08:58,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:58,881 INFO L225 Difference]: With dead ends: 37 [2022-01-31 18:08:58,881 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 18:08:58,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:08:58,887 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:58,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 28 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:08:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 18:08:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-31 18:08:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 18:08:58,903 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2022-01-31 18:08:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:58,903 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 18:08:58,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 18:08:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 18:08:58,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:58,904 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:58,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:08:58,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2075114266, now seen corresponding path program 1 times [2022-01-31 18:08:58,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:58,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236746200] [2022-01-31 18:08:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:58,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:58,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:58,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:58,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:59,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:59,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236746200] [2022-01-31 18:08:59,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [236746200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:59,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:59,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:08:59,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825564617] [2022-01-31 18:08:59,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:59,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:08:59,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:59,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:08:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:08:59,010 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:59,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:59,095 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-01-31 18:08:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:08:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 18:08:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:59,097 INFO L225 Difference]: With dead ends: 39 [2022-01-31 18:08:59,097 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 18:08:59,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:08:59,098 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:59,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:08:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 18:08:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2022-01-31 18:08:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-31 18:08:59,104 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2022-01-31 18:08:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:59,104 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-31 18:08:59,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-31 18:08:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 18:08:59,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:59,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:59,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:08:59,105 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:59,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2022936269, now seen corresponding path program 2 times [2022-01-31 18:08:59,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:59,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184279890] [2022-01-31 18:08:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:59,108 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:59,108 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:59,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:59,109 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:59,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:59,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184279890] [2022-01-31 18:08:59,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184279890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:59,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:59,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:08:59,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837945321] [2022-01-31 18:08:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:59,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:08:59,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:59,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:08:59,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:08:59,217 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:59,313 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-01-31 18:08:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:08:59,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 18:08:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:59,314 INFO L225 Difference]: With dead ends: 43 [2022-01-31 18:08:59,314 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 18:08:59,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:08:59,316 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:59,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:08:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 18:08:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2022-01-31 18:08:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 18:08:59,322 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-01-31 18:08:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:59,323 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 18:08:59,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 18:08:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 18:08:59,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:59,324 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:59,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:08:59,324 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash -405418362, now seen corresponding path program 3 times [2022-01-31 18:08:59,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:59,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381100352] [2022-01-31 18:08:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:59,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:59,327 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:59,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:59,330 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:59,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:59,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381100352] [2022-01-31 18:08:59,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [381100352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:59,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:59,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:08:59,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114960254] [2022-01-31 18:08:59,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:59,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:08:59,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:08:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:08:59,396 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2022-01-31 18:08:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:59,551 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-01-31 18:08:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:08:59,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 20 [2022-01-31 18:08:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:59,552 INFO L225 Difference]: With dead ends: 53 [2022-01-31 18:08:59,552 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 18:08:59,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:08:59,554 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:59,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:08:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 18:08:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-01-31 18:08:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-01-31 18:08:59,561 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2022-01-31 18:08:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:59,562 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-01-31 18:08:59,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2022-01-31 18:08:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-01-31 18:08:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 18:08:59,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:59,563 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:59,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:08:59,563 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1737100295, now seen corresponding path program 4 times [2022-01-31 18:08:59,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:59,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148786484] [2022-01-31 18:08:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:59,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:59,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:59,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:59,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:59,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:59,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148786484] [2022-01-31 18:08:59,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148786484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:59,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:59,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:08:59,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76325349] [2022-01-31 18:08:59,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:59,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:08:59,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:08:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:08:59,672 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:59,819 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-01-31 18:08:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:08:59,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 18:08:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:59,821 INFO L225 Difference]: With dead ends: 59 [2022-01-31 18:08:59,821 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 18:08:59,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:08:59,822 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:59,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:08:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 18:08:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2022-01-31 18:08:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-31 18:08:59,830 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2022-01-31 18:08:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:59,830 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-31 18:08:59,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-31 18:08:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 18:08:59,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:59,831 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:59,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:08:59,832 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -375180890, now seen corresponding path program 5 times [2022-01-31 18:08:59,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:59,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071506661] [2022-01-31 18:08:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:59,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:59,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:59,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:59,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:59,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:59,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071506661] [2022-01-31 18:08:59,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071506661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:59,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:59,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:08:59,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526352045] [2022-01-31 18:08:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:59,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:08:59,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:08:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:08:59,928 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2022-01-31 18:09:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:00,098 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-01-31 18:09:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:09:00,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 24 [2022-01-31 18:09:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:00,102 INFO L225 Difference]: With dead ends: 65 [2022-01-31 18:09:00,102 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 18:09:00,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:09:00,105 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:00,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:09:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 18:09:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2022-01-31 18:09:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-31 18:09:00,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2022-01-31 18:09:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:00,123 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-31 18:09:00,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2022-01-31 18:09:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-31 18:09:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 18:09:00,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:00,124 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:00,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:09:00,127 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash -78400793, now seen corresponding path program 6 times [2022-01-31 18:09:00,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487767047] [2022-01-31 18:09:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:00,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:00,130 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:00,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:00,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:00,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:00,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:00,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487767047] [2022-01-31 18:09:00,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487767047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:00,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:00,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:09:00,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480650278] [2022-01-31 18:09:00,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:00,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:09:00,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:09:00,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:09:00,247 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:00,429 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-01-31 18:09:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:09:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 18:09:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:00,432 INFO L225 Difference]: With dead ends: 71 [2022-01-31 18:09:00,432 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 18:09:00,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:09:00,435 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:00,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 28 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:09:00,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 18:09:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2022-01-31 18:09:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-01-31 18:09:00,450 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2022-01-31 18:09:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:00,452 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-01-31 18:09:00,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-01-31 18:09:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 18:09:00,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:00,453 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:00,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:09:00,454 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash -622359354, now seen corresponding path program 7 times [2022-01-31 18:09:00,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:00,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091344419] [2022-01-31 18:09:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:00,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:00,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:00,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:00,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:00,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:00,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091344419] [2022-01-31 18:09:00,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091344419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:00,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:00,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:09:00,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17895339] [2022-01-31 18:09:00,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:00,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:09:00,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:00,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:09:00,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:09:00,565 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2022-01-31 18:09:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:00,759 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-01-31 18:09:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:09:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 28 [2022-01-31 18:09:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:00,761 INFO L225 Difference]: With dead ends: 77 [2022-01-31 18:09:00,761 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 18:09:00,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:09:00,762 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:00,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 38 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:09:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 18:09:00,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 34. [2022-01-31 18:09:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-01-31 18:09:00,779 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2022-01-31 18:09:00,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:00,781 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-01-31 18:09:00,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2022-01-31 18:09:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-01-31 18:09:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 18:09:00,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:00,785 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:00,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:09:00,785 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1396547129, now seen corresponding path program 8 times [2022-01-31 18:09:00,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:00,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561179442] [2022-01-31 18:09:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:00,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:00,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:00,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:00,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:00,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:00,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561179442] [2022-01-31 18:09:00,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [561179442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:00,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:00,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:09:00,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153471180] [2022-01-31 18:09:00,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:00,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:09:00,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:00,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:09:00,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:09:00,903 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:01,141 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-01-31 18:09:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:09:01,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 18:09:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:01,143 INFO L225 Difference]: With dead ends: 83 [2022-01-31 18:09:01,143 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 18:09:01,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:09:01,144 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:01,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 28 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:09:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 18:09:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2022-01-31 18:09:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 18:09:01,156 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2022-01-31 18:09:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:01,156 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 18:09:01,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 18:09:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 18:09:01,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:01,160 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:01,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:09:01,160 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash -433791002, now seen corresponding path program 9 times [2022-01-31 18:09:01,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:01,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582721559] [2022-01-31 18:09:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:01,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:01,164 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:01,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:01,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:01,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:01,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:01,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582721559] [2022-01-31 18:09:01,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582721559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:01,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:01,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:09:01,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663801083] [2022-01-31 18:09:01,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:01,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:09:01,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:01,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:09:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:09:01,291 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2022-01-31 18:09:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:01,528 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-01-31 18:09:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:09:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 32 [2022-01-31 18:09:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:01,530 INFO L225 Difference]: With dead ends: 89 [2022-01-31 18:09:01,530 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 18:09:01,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:09:01,532 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:01,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 33 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:09:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 18:09:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2022-01-31 18:09:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-01-31 18:09:01,543 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2022-01-31 18:09:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:01,543 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-01-31 18:09:01,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2022-01-31 18:09:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-01-31 18:09:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 18:09:01,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:01,545 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:01,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:09:01,545 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:01,545 INFO L85 PathProgramCache]: Analyzing trace with hash 991172775, now seen corresponding path program 10 times [2022-01-31 18:09:01,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:01,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355568289] [2022-01-31 18:09:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:01,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:01,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:01,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:01,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:01,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:01,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:01,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355568289] [2022-01-31 18:09:01,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355568289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:01,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:01,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:09:01,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317613012] [2022-01-31 18:09:01,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:01,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:09:01,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:01,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:09:01,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:09:01,680 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:01,952 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2022-01-31 18:09:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:09:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 18:09:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:01,954 INFO L225 Difference]: With dead ends: 95 [2022-01-31 18:09:01,954 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 18:09:01,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:09:01,956 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:01,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 23 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:09:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 18:09:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2022-01-31 18:09:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-31 18:09:01,968 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2022-01-31 18:09:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:01,968 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-31 18:09:01,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-31 18:09:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 18:09:01,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:01,969 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:01,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:09:01,970 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:01,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1834822406, now seen corresponding path program 11 times [2022-01-31 18:09:01,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:01,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241825416] [2022-01-31 18:09:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:01,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:01,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:01,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:01,974 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:02,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:02,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:02,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241825416] [2022-01-31 18:09:02,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [241825416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:02,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:02,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:09:02,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943606640] [2022-01-31 18:09:02,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:02,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:09:02,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:09:02,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:09:02,130 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2022-01-31 18:09:02,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:02,446 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-01-31 18:09:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:09:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 36 [2022-01-31 18:09:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:02,447 INFO L225 Difference]: With dead ends: 101 [2022-01-31 18:09:02,447 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 18:09:02,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:09:02,448 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:02,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 43 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 18:09:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 42. [2022-01-31 18:09:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-01-31 18:09:02,454 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 36 [2022-01-31 18:09:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:02,454 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-01-31 18:09:02,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2022-01-31 18:09:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-01-31 18:09:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 18:09:02,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:02,455 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:02,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:09:02,455 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1577506695, now seen corresponding path program 12 times [2022-01-31 18:09:02,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:02,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325756629] [2022-01-31 18:09:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:02,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:02,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:02,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:02,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:02,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:02,602 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:02,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325756629] [2022-01-31 18:09:02,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325756629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:02,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:02,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:09:02,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377575688] [2022-01-31 18:09:02,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:02,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:09:02,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:02,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:09:02,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:09:02,604 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:02,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:02,948 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2022-01-31 18:09:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:09:02,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 18:09:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:02,952 INFO L225 Difference]: With dead ends: 107 [2022-01-31 18:09:02,952 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 18:09:02,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:09:02,957 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:02,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 38 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 18:09:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2022-01-31 18:09:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-01-31 18:09:02,963 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 38 [2022-01-31 18:09:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:02,964 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-01-31 18:09:02,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-01-31 18:09:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 18:09:02,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:02,965 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:02,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:09:02,965 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:02,966 INFO L85 PathProgramCache]: Analyzing trace with hash 705850918, now seen corresponding path program 13 times [2022-01-31 18:09:02,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:02,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126751123] [2022-01-31 18:09:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:02,968 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:02,969 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:02,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:02,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:03,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:03,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:03,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126751123] [2022-01-31 18:09:03,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [126751123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:03,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:03,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:09:03,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224822729] [2022-01-31 18:09:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:03,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:09:03,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:09:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:09:03,147 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2022-01-31 18:09:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:03,540 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2022-01-31 18:09:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:09:03,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 40 [2022-01-31 18:09:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:03,541 INFO L225 Difference]: With dead ends: 113 [2022-01-31 18:09:03,542 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 18:09:03,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:09:03,543 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:03,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 33 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 18:09:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 46. [2022-01-31 18:09:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-01-31 18:09:03,550 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2022-01-31 18:09:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:03,550 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-01-31 18:09:03,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2022-01-31 18:09:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-01-31 18:09:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 18:09:03,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:03,550 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:03,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:09:03,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1512530329, now seen corresponding path program 14 times [2022-01-31 18:09:03,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:03,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537188238] [2022-01-31 18:09:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:03,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:03,552 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:03,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:03,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:03,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:03,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537188238] [2022-01-31 18:09:03,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [537188238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:03,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:03,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:09:03,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063153475] [2022-01-31 18:09:03,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:03,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:09:03,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:09:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:09:03,714 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:04,124 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2022-01-31 18:09:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:09:04,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 18:09:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:04,126 INFO L225 Difference]: With dead ends: 119 [2022-01-31 18:09:04,126 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 18:09:04,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:09:04,127 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:04,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 38 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 18:09:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 48. [2022-01-31 18:09:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-31 18:09:04,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 42 [2022-01-31 18:09:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:04,138 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-31 18:09:04,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-31 18:09:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 18:09:04,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:04,138 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:04,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:09:04,139 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1296476486, now seen corresponding path program 15 times [2022-01-31 18:09:04,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:04,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066750845] [2022-01-31 18:09:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:04,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:04,141 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:04,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:04,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:04,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:04,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066750845] [2022-01-31 18:09:04,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066750845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:04,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:04,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:09:04,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534828021] [2022-01-31 18:09:04,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:04,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:09:04,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:09:04,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:09:04,379 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2022-01-31 18:09:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:04,809 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-01-31 18:09:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:09:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 44 [2022-01-31 18:09:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:04,810 INFO L225 Difference]: With dead ends: 125 [2022-01-31 18:09:04,810 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 18:09:04,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:09:04,812 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:04,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 33 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 18:09:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 50. [2022-01-31 18:09:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-01-31 18:09:04,821 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 44 [2022-01-31 18:09:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:04,821 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-01-31 18:09:04,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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) [2022-01-31 18:09:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-01-31 18:09:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 18:09:04,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:04,822 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:04,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:09:04,822 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:04,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1531407687, now seen corresponding path program 16 times [2022-01-31 18:09:04,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:04,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920052528] [2022-01-31 18:09:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:04,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:04,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:04,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:04,827 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:05,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:05,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:05,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920052528] [2022-01-31 18:09:05,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [920052528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:05,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:05,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:09:05,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195610014] [2022-01-31 18:09:05,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:05,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:09:05,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:09:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:09:05,039 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:05,528 INFO L93 Difference]: Finished difference Result 131 states and 153 transitions. [2022-01-31 18:09:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:09:05,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 18:09:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:05,532 INFO L225 Difference]: With dead ends: 131 [2022-01-31 18:09:05,532 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 18:09:05,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:09:05,533 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:05,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 18:09:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 52. [2022-01-31 18:09:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-01-31 18:09:05,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 46 [2022-01-31 18:09:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:05,542 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-01-31 18:09:05,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-01-31 18:09:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 18:09:05,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:05,542 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:05,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:09:05,542 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1619272602, now seen corresponding path program 17 times [2022-01-31 18:09:05,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:05,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277270993] [2022-01-31 18:09:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:05,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:05,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:05,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:05,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:05,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:05,750 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277270993] [2022-01-31 18:09:05,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [277270993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:05,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:05,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:09:05,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193406833] [2022-01-31 18:09:05,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:05,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:09:05,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:09:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:09:05,751 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2022-01-31 18:09:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:06,216 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2022-01-31 18:09:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:09:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 48 [2022-01-31 18:09:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:06,218 INFO L225 Difference]: With dead ends: 137 [2022-01-31 18:09:06,218 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 18:09:06,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:09:06,219 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:06,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 48 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 18:09:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 54. [2022-01-31 18:09:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-01-31 18:09:06,228 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2022-01-31 18:09:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:06,228 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-01-31 18:09:06,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2022-01-31 18:09:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-01-31 18:09:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 18:09:06,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:06,229 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:06,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:09:06,229 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1603355687, now seen corresponding path program 18 times [2022-01-31 18:09:06,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:06,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759735222] [2022-01-31 18:09:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:06,231 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:06,231 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:06,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:06,232 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:06,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:06,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:06,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759735222] [2022-01-31 18:09:06,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [759735222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:06,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:06,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:09:06,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877016269] [2022-01-31 18:09:06,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:06,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:09:06,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:09:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:09:06,469 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:06,980 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-01-31 18:09:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:09:06,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 18:09:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:06,981 INFO L225 Difference]: With dead ends: 143 [2022-01-31 18:09:06,981 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 18:09:06,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:09:06,982 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:06,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 23 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 18:09:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 56. [2022-01-31 18:09:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-01-31 18:09:06,991 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 50 [2022-01-31 18:09:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:06,991 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-01-31 18:09:06,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-01-31 18:09:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 18:09:06,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:06,992 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:06,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:09:06,992 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1598814330, now seen corresponding path program 19 times [2022-01-31 18:09:06,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:06,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519831912] [2022-01-31 18:09:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:06,994 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:06,994 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:06,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:06,996 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:07,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:07,231 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:07,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519831912] [2022-01-31 18:09:07,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519831912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:07,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:07,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:09:07,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256098498] [2022-01-31 18:09:07,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:07,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:09:07,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:09:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:09:07,233 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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) [2022-01-31 18:09:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:07,752 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2022-01-31 18:09:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:09:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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 52 [2022-01-31 18:09:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:07,755 INFO L225 Difference]: With dead ends: 149 [2022-01-31 18:09:07,755 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 18:09:07,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:09:07,756 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 83 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:07,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 38 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 18:09:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 58. [2022-01-31 18:09:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-01-31 18:09:07,766 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2022-01-31 18:09:07,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:07,766 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-01-31 18:09:07,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 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) [2022-01-31 18:09:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-01-31 18:09:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 18:09:07,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:07,767 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:07,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:09:07,767 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash 208937735, now seen corresponding path program 20 times [2022-01-31 18:09:07,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:07,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468804139] [2022-01-31 18:09:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:07,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:07,769 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:07,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:07,770 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:08,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:08,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:08,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468804139] [2022-01-31 18:09:08,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1468804139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:08,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:08,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:09:08,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737008440] [2022-01-31 18:09:08,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:08,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:09:08,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:08,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:09:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:09:08,032 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:08,596 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2022-01-31 18:09:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:09:08,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 18:09:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:08,597 INFO L225 Difference]: With dead ends: 155 [2022-01-31 18:09:08,597 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 18:09:08,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:09:08,599 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:08,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 23 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 18:09:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 60. [2022-01-31 18:09:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-31 18:09:08,609 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 54 [2022-01-31 18:09:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:08,609 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-31 18:09:08,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-31 18:09:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 18:09:08,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:08,610 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:08,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:09:08,610 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1468978522, now seen corresponding path program 21 times [2022-01-31 18:09:08,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:08,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985546895] [2022-01-31 18:09:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:08,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:08,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:08,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:08,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:08,884 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985546895] [2022-01-31 18:09:08,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985546895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:08,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:08,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:09:08,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784386901] [2022-01-31 18:09:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:08,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:09:08,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:09:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:09:08,886 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2022-01-31 18:09:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:09,489 INFO L93 Difference]: Finished difference Result 161 states and 188 transitions. [2022-01-31 18:09:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:09:09,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 56 [2022-01-31 18:09:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:09,490 INFO L225 Difference]: With dead ends: 161 [2022-01-31 18:09:09,490 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 18:09:09,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:09:09,491 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:09,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 28 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 18:09:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 62. [2022-01-31 18:09:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-01-31 18:09:09,501 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2022-01-31 18:09:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:09,502 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-01-31 18:09:09,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2022-01-31 18:09:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-01-31 18:09:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 18:09:09,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:09,502 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:09,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:09:09,502 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash 338561511, now seen corresponding path program 22 times [2022-01-31 18:09:09,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:09,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847346245] [2022-01-31 18:09:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:09,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:09,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:09,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:09,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:09,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:09,842 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:09,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847346245] [2022-01-31 18:09:09,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847346245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:09,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:09,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:09:09,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140275039] [2022-01-31 18:09:09,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:09,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:09:09,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:09:09,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:09:09,844 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:10,578 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-01-31 18:09:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:09:10,578 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 18:09:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:10,579 INFO L225 Difference]: With dead ends: 167 [2022-01-31 18:09:10,579 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 18:09:10,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:09:10,581 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:10,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 43 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 18:09:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 64. [2022-01-31 18:09:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-01-31 18:09:10,593 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 58 [2022-01-31 18:09:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:10,593 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-01-31 18:09:10,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-01-31 18:09:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 18:09:10,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:10,594 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:10,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:09:10,594 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash 95765958, now seen corresponding path program 23 times [2022-01-31 18:09:10,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:10,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863164246] [2022-01-31 18:09:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:10,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:10,596 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:10,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:10,609 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:10,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:10,926 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:10,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863164246] [2022-01-31 18:09:10,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [863164246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:10,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:10,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:09:10,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330249086] [2022-01-31 18:09:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:10,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:09:10,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:09:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:09:10,928 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2022-01-31 18:09:11,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:11,604 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2022-01-31 18:09:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:09:11,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 60 [2022-01-31 18:09:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:11,605 INFO L225 Difference]: With dead ends: 173 [2022-01-31 18:09:11,605 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 18:09:11,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:09:11,606 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:11,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 33 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:09:11,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 18:09:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 66. [2022-01-31 18:09:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-01-31 18:09:11,618 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 60 [2022-01-31 18:09:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:11,618 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-01-31 18:09:11,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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) [2022-01-31 18:09:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-01-31 18:09:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 18:09:11,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:11,619 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:11,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:09:11,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1635580103, now seen corresponding path program 24 times [2022-01-31 18:09:11,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949643111] [2022-01-31 18:09:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:11,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:11,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:11,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:11,622 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:11,984 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:11,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949643111] [2022-01-31 18:09:11,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949643111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:11,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:11,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:09:11,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524994569] [2022-01-31 18:09:11,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:11,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:09:11,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:11,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:09:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:09:11,986 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:12,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:12,807 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2022-01-31 18:09:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:09:12,807 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 18:09:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:12,808 INFO L225 Difference]: With dead ends: 179 [2022-01-31 18:09:12,808 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 18:09:12,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:09:12,809 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:12,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 48 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 18:09:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 68. [2022-01-31 18:09:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-01-31 18:09:12,823 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 62 [2022-01-31 18:09:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:12,823 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-01-31 18:09:12,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-01-31 18:09:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 18:09:12,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:12,824 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:12,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:09:12,824 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:12,825 INFO L85 PathProgramCache]: Analyzing trace with hash 520247526, now seen corresponding path program 25 times [2022-01-31 18:09:12,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:12,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186676261] [2022-01-31 18:09:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:12,826 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:12,826 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:12,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:12,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:13,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:13,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:13,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186676261] [2022-01-31 18:09:13,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186676261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:13,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:13,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:09:13,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684336595] [2022-01-31 18:09:13,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:13,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:09:13,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:09:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:09:13,180 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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) [2022-01-31 18:09:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:13,943 INFO L93 Difference]: Finished difference Result 185 states and 216 transitions. [2022-01-31 18:09:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:09:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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 64 [2022-01-31 18:09:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:13,944 INFO L225 Difference]: With dead ends: 185 [2022-01-31 18:09:13,945 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 18:09:13,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:09:13,946 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:13,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 28 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 18:09:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 70. [2022-01-31 18:09:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-01-31 18:09:13,961 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2022-01-31 18:09:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:13,962 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-01-31 18:09:13,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 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) [2022-01-31 18:09:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-01-31 18:09:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 18:09:13,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:13,962 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:13,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:09:13,963 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -140578905, now seen corresponding path program 26 times [2022-01-31 18:09:13,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:13,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167953556] [2022-01-31 18:09:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:13,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:13,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:13,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:13,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:14,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167953556] [2022-01-31 18:09:14,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [167953556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:14,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:14,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:09:14,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144158386] [2022-01-31 18:09:14,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:14,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:09:14,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:09:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:09:14,353 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:15,305 INFO L93 Difference]: Finished difference Result 191 states and 223 transitions. [2022-01-31 18:09:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:09:15,305 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 18:09:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:15,306 INFO L225 Difference]: With dead ends: 191 [2022-01-31 18:09:15,306 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 18:09:15,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:09:15,308 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:15,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 43 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 18:09:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 72. [2022-01-31 18:09:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-01-31 18:09:15,324 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 66 [2022-01-31 18:09:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:15,324 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-01-31 18:09:15,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-01-31 18:09:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 18:09:15,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:15,324 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:15,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:09:15,325 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1839569914, now seen corresponding path program 27 times [2022-01-31 18:09:15,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928415191] [2022-01-31 18:09:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:15,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:15,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:15,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:15,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:15,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:15,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928415191] [2022-01-31 18:09:15,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [928415191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:15,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:15,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:09:15,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188775283] [2022-01-31 18:09:15,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:15,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:09:15,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:15,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:09:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:09:15,750 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2022-01-31 18:09:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:16,688 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2022-01-31 18:09:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:09:16,688 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 68 [2022-01-31 18:09:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:16,689 INFO L225 Difference]: With dead ends: 197 [2022-01-31 18:09:16,689 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 18:09:16,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:09:16,691 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:16,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 33 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 18:09:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 74. [2022-01-31 18:09:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-01-31 18:09:16,706 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 68 [2022-01-31 18:09:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:16,707 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-01-31 18:09:16,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2022-01-31 18:09:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-01-31 18:09:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 18:09:16,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:16,707 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:16,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:09:16,708 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash -766382457, now seen corresponding path program 28 times [2022-01-31 18:09:16,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:16,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049911499] [2022-01-31 18:09:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:16,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:16,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:16,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:16,711 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:17,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049911499] [2022-01-31 18:09:17,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2049911499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:17,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:17,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:09:17,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109150576] [2022-01-31 18:09:17,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:17,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:09:17,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:09:17,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:09:17,160 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:18,089 INFO L93 Difference]: Finished difference Result 203 states and 237 transitions. [2022-01-31 18:09:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:09:18,089 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 18:09:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:18,090 INFO L225 Difference]: With dead ends: 203 [2022-01-31 18:09:18,090 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 18:09:18,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:09:18,092 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 125 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:18,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 48 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 18:09:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2022-01-31 18:09:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-01-31 18:09:18,109 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 70 [2022-01-31 18:09:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:18,109 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-01-31 18:09:18,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-01-31 18:09:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 18:09:18,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:18,110 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:18,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:09:18,110 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1430218534, now seen corresponding path program 29 times [2022-01-31 18:09:18,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:18,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653881641] [2022-01-31 18:09:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:18,111 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:18,111 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:18,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:18,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:18,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:18,556 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653881641] [2022-01-31 18:09:18,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [653881641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:18,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:18,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:09:18,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593689617] [2022-01-31 18:09:18,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:18,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:09:18,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:09:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:09:18,558 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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) [2022-01-31 18:09:19,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:19,523 INFO L93 Difference]: Finished difference Result 209 states and 244 transitions. [2022-01-31 18:09:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:09:19,523 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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 72 [2022-01-31 18:09:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:19,524 INFO L225 Difference]: With dead ends: 209 [2022-01-31 18:09:19,524 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 18:09:19,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:09:19,525 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 143 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:19,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 38 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 18:09:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 78. [2022-01-31 18:09:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-01-31 18:09:19,543 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2022-01-31 18:09:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:19,543 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-01-31 18:09:19,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 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) [2022-01-31 18:09:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-01-31 18:09:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 18:09:19,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:19,544 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:19,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:09:19,544 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash -975964825, now seen corresponding path program 30 times [2022-01-31 18:09:19,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:19,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168046327] [2022-01-31 18:09:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:19,546 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:19,546 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:19,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:19,548 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:19,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:19,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168046327] [2022-01-31 18:09:19,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [168046327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:19,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:19,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:09:19,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753964389] [2022-01-31 18:09:19,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:19,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:09:19,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:09:19,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:09:19,984 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:21,012 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2022-01-31 18:09:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:09:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 18:09:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:21,013 INFO L225 Difference]: With dead ends: 215 [2022-01-31 18:09:21,013 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 18:09:21,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:09:21,015 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:21,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 43 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 18:09:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2022-01-31 18:09:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-01-31 18:09:21,044 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 74 [2022-01-31 18:09:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:21,045 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-01-31 18:09:21,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-01-31 18:09:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 18:09:21,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:21,045 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:21,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:09:21,046 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:21,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:21,046 INFO L85 PathProgramCache]: Analyzing trace with hash -726441402, now seen corresponding path program 31 times [2022-01-31 18:09:21,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:21,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49424308] [2022-01-31 18:09:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:21,047 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:21,047 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:21,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:21,049 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:21,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:21,510 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49424308] [2022-01-31 18:09:21,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [49424308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:21,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:21,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:09:21,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305284575] [2022-01-31 18:09:21,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:21,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:09:21,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:09:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:09:21,512 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 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) [2022-01-31 18:09:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:22,668 INFO L93 Difference]: Finished difference Result 221 states and 258 transitions. [2022-01-31 18:09:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:09:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 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 76 [2022-01-31 18:09:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:22,672 INFO L225 Difference]: With dead ends: 221 [2022-01-31 18:09:22,672 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 18:09:22,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:09:22,674 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 159 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:22,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 33 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 18:09:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 82. [2022-01-31 18:09:22,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-01-31 18:09:22,693 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 76 [2022-01-31 18:09:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:22,695 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-01-31 18:09:22,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 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) [2022-01-31 18:09:22,696 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-01-31 18:09:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 18:09:22,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:22,696 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:22,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:09:22,697 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1591936071, now seen corresponding path program 32 times [2022-01-31 18:09:22,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:22,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611724761] [2022-01-31 18:09:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:22,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:22,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:22,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:22,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:23,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:23,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611724761] [2022-01-31 18:09:23,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611724761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:23,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:23,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:09:23,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35380885] [2022-01-31 18:09:23,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:23,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:09:23,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:09:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:09:23,173 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:24,399 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2022-01-31 18:09:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:09:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 18:09:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:24,401 INFO L225 Difference]: With dead ends: 227 [2022-01-31 18:09:24,401 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 18:09:24,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:09:24,401 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:24,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 33 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 18:09:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 84. [2022-01-31 18:09:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-01-31 18:09:24,431 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 78 [2022-01-31 18:09:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:24,431 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-01-31 18:09:24,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-01-31 18:09:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 18:09:24,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:24,432 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:24,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:09:24,432 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash 356013414, now seen corresponding path program 33 times [2022-01-31 18:09:24,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:24,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753684478] [2022-01-31 18:09:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:24,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:24,433 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:24,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:24,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:25,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:25,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753684478] [2022-01-31 18:09:25,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753684478] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:25,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:25,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:09:25,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305083942] [2022-01-31 18:09:25,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:25,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:09:25,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:25,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:09:25,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:09:25,053 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 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) [2022-01-31 18:09:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:26,342 INFO L93 Difference]: Finished difference Result 233 states and 272 transitions. [2022-01-31 18:09:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:09:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 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 80 [2022-01-31 18:09:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:26,343 INFO L225 Difference]: With dead ends: 233 [2022-01-31 18:09:26,343 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 18:09:26,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:09:26,344 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 146 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:26,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 53 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 18:09:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 86. [2022-01-31 18:09:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-01-31 18:09:26,366 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2022-01-31 18:09:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:26,366 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-01-31 18:09:26,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 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) [2022-01-31 18:09:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-01-31 18:09:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 18:09:26,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:26,367 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:26,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:09:26,367 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1027794137, now seen corresponding path program 34 times [2022-01-31 18:09:26,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:26,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056393289] [2022-01-31 18:09:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:26,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:26,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:26,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:26,371 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:26,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:26,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:26,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056393289] [2022-01-31 18:09:26,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056393289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:26,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:26,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:09:26,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131147749] [2022-01-31 18:09:26,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:26,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:09:26,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:09:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:09:26,947 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:28,237 INFO L93 Difference]: Finished difference Result 239 states and 279 transitions. [2022-01-31 18:09:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:09:28,237 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 18:09:28,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:28,238 INFO L225 Difference]: With dead ends: 239 [2022-01-31 18:09:28,238 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 18:09:28,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:09:28,239 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:28,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 33 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 18:09:28,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 88. [2022-01-31 18:09:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:28,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-01-31 18:09:28,262 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 82 [2022-01-31 18:09:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:28,262 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-01-31 18:09:28,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-01-31 18:09:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 18:09:28,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:28,263 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:28,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:09:28,263 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash -758103930, now seen corresponding path program 35 times [2022-01-31 18:09:28,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:28,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264613964] [2022-01-31 18:09:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:28,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:28,264 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:28,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:28,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:28,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264613964] [2022-01-31 18:09:28,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264613964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:28,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:28,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:09:28,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650189634] [2022-01-31 18:09:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:28,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:09:28,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:09:28,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:09:28,850 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 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) [2022-01-31 18:09:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:30,298 INFO L93 Difference]: Finished difference Result 245 states and 286 transitions. [2022-01-31 18:09:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:09:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 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 84 [2022-01-31 18:09:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:30,299 INFO L225 Difference]: With dead ends: 245 [2022-01-31 18:09:30,299 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 18:09:30,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:09:30,300 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:30,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 33 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 18:09:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 90. [2022-01-31 18:09:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-01-31 18:09:30,318 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 84 [2022-01-31 18:09:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:30,318 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-01-31 18:09:30,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 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) [2022-01-31 18:09:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-01-31 18:09:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 18:09:30,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:30,319 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:30,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:09:30,319 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1893713401, now seen corresponding path program 36 times [2022-01-31 18:09:30,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:30,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312271114] [2022-01-31 18:09:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:30,321 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:30,321 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:30,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:30,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:30,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:30,878 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:30,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312271114] [2022-01-31 18:09:30,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1312271114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:30,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:30,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:09:30,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371832978] [2022-01-31 18:09:30,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:30,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:09:30,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:09:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:09:30,879 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:32,466 INFO L93 Difference]: Finished difference Result 251 states and 293 transitions. [2022-01-31 18:09:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:09:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 18:09:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:32,467 INFO L225 Difference]: With dead ends: 251 [2022-01-31 18:09:32,467 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 18:09:32,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:09:32,469 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 220 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:32,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 33 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 18:09:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 92. [2022-01-31 18:09:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-01-31 18:09:32,497 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2022-01-31 18:09:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:32,497 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-01-31 18:09:32,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-01-31 18:09:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 18:09:32,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:32,498 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:32,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:09:32,498 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1594023002, now seen corresponding path program 37 times [2022-01-31 18:09:32,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:32,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405272449] [2022-01-31 18:09:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:32,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:32,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:32,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:32,502 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:33,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:33,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:33,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405272449] [2022-01-31 18:09:33,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405272449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:33,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:33,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:09:33,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666918225] [2022-01-31 18:09:33,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:33,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:09:33,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:09:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:09:33,098 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 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) [2022-01-31 18:09:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:34,749 INFO L93 Difference]: Finished difference Result 257 states and 300 transitions. [2022-01-31 18:09:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:09:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 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 88 [2022-01-31 18:09:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:34,751 INFO L225 Difference]: With dead ends: 257 [2022-01-31 18:09:34,751 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 18:09:34,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:09:34,752 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 184 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:34,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 43 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 18:09:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 94. [2022-01-31 18:09:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-01-31 18:09:34,780 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2022-01-31 18:09:34,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:34,780 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-01-31 18:09:34,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 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) [2022-01-31 18:09:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-01-31 18:09:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 18:09:34,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:34,781 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:34,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:09:34,781 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:34,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1169530649, now seen corresponding path program 38 times [2022-01-31 18:09:34,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:34,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728666328] [2022-01-31 18:09:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:34,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:34,783 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:34,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:34,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:35,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:35,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:35,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728666328] [2022-01-31 18:09:35,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [728666328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:35,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:35,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:09:35,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52775451] [2022-01-31 18:09:35,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:35,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:09:35,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:35,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:09:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:09:35,409 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:37,214 INFO L93 Difference]: Finished difference Result 263 states and 307 transitions. [2022-01-31 18:09:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:09:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 18:09:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:37,215 INFO L225 Difference]: With dead ends: 263 [2022-01-31 18:09:37,215 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 18:09:37,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:09:37,217 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 204 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:37,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 38 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 18:09:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 96. [2022-01-31 18:09:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-01-31 18:09:37,241 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 90 [2022-01-31 18:09:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:37,241 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-01-31 18:09:37,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-01-31 18:09:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 18:09:37,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:37,242 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:37,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:09:37,242 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:37,243 INFO L85 PathProgramCache]: Analyzing trace with hash 180420294, now seen corresponding path program 39 times [2022-01-31 18:09:37,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:37,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828252580] [2022-01-31 18:09:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:37,244 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:37,244 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:37,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:37,248 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:37,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:37,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828252580] [2022-01-31 18:09:37,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [828252580] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:37,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:37,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:09:37,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742572686] [2022-01-31 18:09:37,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:37,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:09:37,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:37,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:09:37,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:09:37,867 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 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) [2022-01-31 18:09:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:39,600 INFO L93 Difference]: Finished difference Result 269 states and 314 transitions. [2022-01-31 18:09:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:09:39,600 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 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 92 [2022-01-31 18:09:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:39,601 INFO L225 Difference]: With dead ends: 269 [2022-01-31 18:09:39,601 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 18:09:39,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:09:39,602 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 190 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:39,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 58 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 18:09:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 98. [2022-01-31 18:09:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-01-31 18:09:39,623 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 92 [2022-01-31 18:09:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:39,623 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-01-31 18:09:39,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 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) [2022-01-31 18:09:39,623 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-01-31 18:09:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 18:09:39,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:39,624 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:39,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:09:39,624 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:39,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1928957895, now seen corresponding path program 40 times [2022-01-31 18:09:39,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:39,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762592617] [2022-01-31 18:09:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:39,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:39,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:39,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:39,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:40,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:40,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762592617] [2022-01-31 18:09:40,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762592617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:40,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:40,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:09:40,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806082206] [2022-01-31 18:09:40,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:40,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:09:40,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:40,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:09:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:09:40,280 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:42,126 INFO L93 Difference]: Finished difference Result 275 states and 321 transitions. [2022-01-31 18:09:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:09:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 18:09:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:42,128 INFO L225 Difference]: With dead ends: 275 [2022-01-31 18:09:42,128 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 18:09:42,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:09:42,129 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 161 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:42,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 48 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:42,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 18:09:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 100. [2022-01-31 18:09:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-01-31 18:09:42,152 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 94 [2022-01-31 18:09:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:42,152 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-01-31 18:09:42,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-01-31 18:09:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 18:09:42,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:42,153 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:42,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:09:42,153 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:42,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1298279962, now seen corresponding path program 41 times [2022-01-31 18:09:42,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:42,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748948719] [2022-01-31 18:09:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:42,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:42,155 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:42,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:42,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:42,887 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748948719] [2022-01-31 18:09:42,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748948719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:42,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:42,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:09:42,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771756569] [2022-01-31 18:09:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:42,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:09:42,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:09:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:09:42,889 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 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) [2022-01-31 18:09:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:44,880 INFO L93 Difference]: Finished difference Result 281 states and 328 transitions. [2022-01-31 18:09:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:09:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 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 96 [2022-01-31 18:09:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:44,882 INFO L225 Difference]: With dead ends: 281 [2022-01-31 18:09:44,882 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 18:09:44,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:09:44,883 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:44,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 43 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 18:09:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 102. [2022-01-31 18:09:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2022-01-31 18:09:44,912 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 96 [2022-01-31 18:09:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:44,912 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2022-01-31 18:09:44,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 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) [2022-01-31 18:09:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2022-01-31 18:09:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 18:09:44,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:44,913 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:44,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:09:44,914 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:44,914 INFO L85 PathProgramCache]: Analyzing trace with hash 7063207, now seen corresponding path program 42 times [2022-01-31 18:09:44,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:44,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646761607] [2022-01-31 18:09:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:44,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:44,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:44,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:44,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:45,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:45,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646761607] [2022-01-31 18:09:45,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [646761607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:45,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:45,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:09:45,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663453483] [2022-01-31 18:09:45,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:45,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:09:45,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:09:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:09:45,667 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:47,845 INFO L93 Difference]: Finished difference Result 287 states and 335 transitions. [2022-01-31 18:09:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:09:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 18:09:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:47,846 INFO L225 Difference]: With dead ends: 287 [2022-01-31 18:09:47,846 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 18:09:47,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:09:47,847 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 195 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:47,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 33 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:09:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 18:09:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 104. [2022-01-31 18:09:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-01-31 18:09:47,875 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 98 [2022-01-31 18:09:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:47,875 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-01-31 18:09:47,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-01-31 18:09:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 18:09:47,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:47,876 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:47,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:09:47,876 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1922407686, now seen corresponding path program 43 times [2022-01-31 18:09:47,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:47,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050667200] [2022-01-31 18:09:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:47,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:47,877 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:47,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:47,880 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:48,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:48,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:48,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050667200] [2022-01-31 18:09:48,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1050667200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:48,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:48,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:09:48,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282621266] [2022-01-31 18:09:48,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:48,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:09:48,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:48,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:09:48,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:09:48,692 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 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) [2022-01-31 18:09:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:50,849 INFO L93 Difference]: Finished difference Result 293 states and 342 transitions. [2022-01-31 18:09:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:09:50,849 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 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 100 [2022-01-31 18:09:50,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:50,850 INFO L225 Difference]: With dead ends: 293 [2022-01-31 18:09:50,850 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 18:09:50,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:09:50,851 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:50,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 43 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [647 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 18:09:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 106. [2022-01-31 18:09:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-01-31 18:09:50,893 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2022-01-31 18:09:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:50,893 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-01-31 18:09:50,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 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) [2022-01-31 18:09:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-01-31 18:09:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 18:09:50,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:50,894 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:50,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:09:50,894 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1570830969, now seen corresponding path program 44 times [2022-01-31 18:09:50,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:50,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913418185] [2022-01-31 18:09:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:50,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:50,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:50,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:50,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:51,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:51,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913418185] [2022-01-31 18:09:51,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1913418185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:51,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:51,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:09:51,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545448810] [2022-01-31 18:09:51,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:51,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:09:51,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:51,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:09:51,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:09:51,668 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:53,934 INFO L93 Difference]: Finished difference Result 299 states and 349 transitions. [2022-01-31 18:09:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:09:53,935 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 18:09:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:53,936 INFO L225 Difference]: With dead ends: 299 [2022-01-31 18:09:53,936 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 18:09:53,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:09:53,937 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 199 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:53,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 28 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:09:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 18:09:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 108. [2022-01-31 18:09:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-01-31 18:09:53,973 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 102 [2022-01-31 18:09:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:53,973 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-01-31 18:09:53,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:09:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-01-31 18:09:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 18:09:53,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:53,974 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:53,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:09:53,974 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2083151910, now seen corresponding path program 45 times [2022-01-31 18:09:53,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:53,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092238781] [2022-01-31 18:09:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:53,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:53,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:53,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:53,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:54,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:54,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:54,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092238781] [2022-01-31 18:09:54,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092238781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:54,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:54,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:09:54,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492520449] [2022-01-31 18:09:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:54,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:09:54,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:54,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:09:54,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:09:54,862 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 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) [2022-01-31 18:09:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:57,270 INFO L93 Difference]: Finished difference Result 305 states and 356 transitions. [2022-01-31 18:09:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:09:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 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 104 [2022-01-31 18:09:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:57,271 INFO L225 Difference]: With dead ends: 305 [2022-01-31 18:09:57,271 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 18:09:57,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:09:57,272 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 278 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:57,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 28 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:09:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 18:09:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 110. [2022-01-31 18:09:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2022-01-31 18:09:57,301 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2022-01-31 18:09:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:57,301 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2022-01-31 18:09:57,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 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) [2022-01-31 18:09:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2022-01-31 18:09:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 18:09:57,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:57,302 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:57,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:09:57,302 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:57,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:57,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1896959079, now seen corresponding path program 46 times [2022-01-31 18:09:57,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:57,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833430457] [2022-01-31 18:09:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:57,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:57,304 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:57,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:57,307 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:58,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:58,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:58,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833430457] [2022-01-31 18:09:58,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833430457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:58,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:58,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:09:58,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085517508] [2022-01-31 18:09:58,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:58,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:09:58,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:58,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:09:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:09:58,178 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:00,652 INFO L93 Difference]: Finished difference Result 311 states and 363 transitions. [2022-01-31 18:10:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:10:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 18:10:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:00,653 INFO L225 Difference]: With dead ends: 311 [2022-01-31 18:10:00,653 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 18:10:00,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:10:00,654 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 225 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:00,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 53 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 18:10:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 112. [2022-01-31 18:10:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-01-31 18:10:00,683 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 106 [2022-01-31 18:10:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:00,683 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-01-31 18:10:00,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-01-31 18:10:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 18:10:00,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:00,684 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:00,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:10:00,684 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2019433286, now seen corresponding path program 47 times [2022-01-31 18:10:00,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:00,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512191623] [2022-01-31 18:10:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:00,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:00,685 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:00,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:00,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:01,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:01,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:01,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512191623] [2022-01-31 18:10:01,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [512191623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:01,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:01,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:10:01,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850199921] [2022-01-31 18:10:01,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:01,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:10:01,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:10:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:10:01,556 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 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) [2022-01-31 18:10:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:04,175 INFO L93 Difference]: Finished difference Result 317 states and 370 transitions. [2022-01-31 18:10:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:10:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 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 108 [2022-01-31 18:10:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:04,176 INFO L225 Difference]: With dead ends: 317 [2022-01-31 18:10:04,176 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 18:10:04,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:10:04,177 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 247 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:04,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 48 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 18:10:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 114. [2022-01-31 18:10:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2022-01-31 18:10:04,218 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 108 [2022-01-31 18:10:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:04,218 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2022-01-31 18:10:04,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 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) [2022-01-31 18:10:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2022-01-31 18:10:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 18:10:04,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:04,219 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:04,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:10:04,220 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1027644231, now seen corresponding path program 48 times [2022-01-31 18:10:04,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:04,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72643806] [2022-01-31 18:10:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:04,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:04,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:04,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:04,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:05,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:05,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72643806] [2022-01-31 18:10:05,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [72643806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:05,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:05,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:10:05,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507491985] [2022-01-31 18:10:05,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:05,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:10:05,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:05,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:10:05,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:10:05,247 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:08,012 INFO L93 Difference]: Finished difference Result 323 states and 377 transitions. [2022-01-31 18:10:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:10:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 18:10:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:08,014 INFO L225 Difference]: With dead ends: 323 [2022-01-31 18:10:08,014 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 18:10:08,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:10:08,015 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 229 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:08,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 33 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 18:10:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 116. [2022-01-31 18:10:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-01-31 18:10:08,058 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 110 [2022-01-31 18:10:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:08,058 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-01-31 18:10:08,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-01-31 18:10:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 18:10:08,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:08,059 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:08,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:10:08,059 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:08,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1481453978, now seen corresponding path program 49 times [2022-01-31 18:10:08,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:08,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473970777] [2022-01-31 18:10:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:08,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:08,061 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:08,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:08,064 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:08,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:08,987 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:08,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473970777] [2022-01-31 18:10:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473970777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:08,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:08,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:10:08,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315529609] [2022-01-31 18:10:08,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:08,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:10:08,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:08,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:10:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:10:08,988 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 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) [2022-01-31 18:10:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:11,849 INFO L93 Difference]: Finished difference Result 329 states and 384 transitions. [2022-01-31 18:10:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:10:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 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 112 [2022-01-31 18:10:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:11,850 INFO L225 Difference]: With dead ends: 329 [2022-01-31 18:10:11,850 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 18:10:11,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:10:11,852 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 274 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:11,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 28 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 18:10:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 118. [2022-01-31 18:10:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-01-31 18:10:11,891 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2022-01-31 18:10:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:11,891 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-01-31 18:10:11,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 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) [2022-01-31 18:10:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-01-31 18:10:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 18:10:11,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:11,892 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:11,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:10:11,893 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1881862695, now seen corresponding path program 50 times [2022-01-31 18:10:11,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019407637] [2022-01-31 18:10:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:11,894 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:11,894 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:11,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:11,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:12,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019407637] [2022-01-31 18:10:12,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019407637] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:12,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:12,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:10:12,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523890851] [2022-01-31 18:10:12,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:12,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:10:12,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:10:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:10:12,929 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:15,879 INFO L93 Difference]: Finished difference Result 335 states and 391 transitions. [2022-01-31 18:10:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:10:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 18:10:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:15,880 INFO L225 Difference]: With dead ends: 335 [2022-01-31 18:10:15,880 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 18:10:15,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:10:15,881 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:15,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 28 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 18:10:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 120. [2022-01-31 18:10:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-01-31 18:10:15,924 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 114 [2022-01-31 18:10:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:15,925 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-01-31 18:10:15,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-01-31 18:10:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 18:10:15,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:15,925 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:15,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:10:15,925 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash 36338054, now seen corresponding path program 51 times [2022-01-31 18:10:15,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:15,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92887203] [2022-01-31 18:10:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:15,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:15,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:15,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:15,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:17,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:17,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92887203] [2022-01-31 18:10:17,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [92887203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:17,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:17,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:10:17,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487301710] [2022-01-31 18:10:17,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:17,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:10:17,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:10:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:10:17,006 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 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) [2022-01-31 18:10:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:20,170 INFO L93 Difference]: Finished difference Result 341 states and 398 transitions. [2022-01-31 18:10:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:10:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 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 116 [2022-01-31 18:10:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:20,172 INFO L225 Difference]: With dead ends: 341 [2022-01-31 18:10:20,172 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 18:10:20,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:10:20,173 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 248 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:20,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 48 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 18:10:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 122. [2022-01-31 18:10:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2022-01-31 18:10:20,212 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 116 [2022-01-31 18:10:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:20,212 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2022-01-31 18:10:20,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 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) [2022-01-31 18:10:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2022-01-31 18:10:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 18:10:20,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:20,213 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:20,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:10:20,213 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash -342994681, now seen corresponding path program 52 times [2022-01-31 18:10:20,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:20,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539678903] [2022-01-31 18:10:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:20,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:20,215 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:20,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:20,219 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:21,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:21,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539678903] [2022-01-31 18:10:21,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [539678903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:21,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:21,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:10:21,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886038017] [2022-01-31 18:10:21,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:21,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:10:21,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:10:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:10:21,235 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:24,553 INFO L93 Difference]: Finished difference Result 347 states and 405 transitions. [2022-01-31 18:10:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:10:24,553 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 18:10:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:24,555 INFO L225 Difference]: With dead ends: 347 [2022-01-31 18:10:24,555 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 18:10:24,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:10:24,556 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 251 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:24,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 48 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 18:10:24,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 124. [2022-01-31 18:10:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-01-31 18:10:24,594 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 118 [2022-01-31 18:10:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:24,595 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-01-31 18:10:24,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-01-31 18:10:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 18:10:24,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:24,595 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:24,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:10:24,595 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1464278182, now seen corresponding path program 53 times [2022-01-31 18:10:24,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971887330] [2022-01-31 18:10:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:24,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:24,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:24,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:24,601 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:25,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:25,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971887330] [2022-01-31 18:10:25,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [971887330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:25,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:25,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:10:25,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587227361] [2022-01-31 18:10:25,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:25,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:10:25,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:10:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:10:25,675 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 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) [2022-01-31 18:10:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:29,175 INFO L93 Difference]: Finished difference Result 353 states and 412 transitions. [2022-01-31 18:10:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:10:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 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 120 [2022-01-31 18:10:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:29,177 INFO L225 Difference]: With dead ends: 353 [2022-01-31 18:10:29,177 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 18:10:29,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:10:29,178 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 265 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 862 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 862 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:29,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 33 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [862 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 18:10:29,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 126. [2022-01-31 18:10:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2022-01-31 18:10:29,226 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 120 [2022-01-31 18:10:29,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:29,226 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2022-01-31 18:10:29,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 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) [2022-01-31 18:10:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2022-01-31 18:10:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 18:10:29,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:29,227 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:29,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:10:29,228 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -374818841, now seen corresponding path program 54 times [2022-01-31 18:10:29,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:29,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290456665] [2022-01-31 18:10:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:29,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:29,230 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:29,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:29,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:30,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:30,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:30,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290456665] [2022-01-31 18:10:30,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [290456665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:30,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:30,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:10:30,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44810257] [2022-01-31 18:10:30,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:30,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:10:30,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:30,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:10:30,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:10:30,374 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:34,023 INFO L93 Difference]: Finished difference Result 359 states and 419 transitions. [2022-01-31 18:10:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:10:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 18:10:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:34,025 INFO L225 Difference]: With dead ends: 359 [2022-01-31 18:10:34,025 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 18:10:34,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:10:34,026 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 276 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:34,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 33 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 18:10:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 128. [2022-01-31 18:10:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-01-31 18:10:34,066 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 122 [2022-01-31 18:10:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:34,066 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-01-31 18:10:34,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-01-31 18:10:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 18:10:34,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:34,066 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:34,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:10:34,067 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1846196166, now seen corresponding path program 55 times [2022-01-31 18:10:34,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:34,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826966954] [2022-01-31 18:10:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:34,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:34,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:34,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:34,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:35,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:35,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826966954] [2022-01-31 18:10:35,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [826966954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:35,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:35,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:10:35,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370523493] [2022-01-31 18:10:35,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:35,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:10:35,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:10:35,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:10:35,267 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 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) [2022-01-31 18:10:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:39,114 INFO L93 Difference]: Finished difference Result 365 states and 426 transitions. [2022-01-31 18:10:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:10:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 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 124 [2022-01-31 18:10:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:39,115 INFO L225 Difference]: With dead ends: 365 [2022-01-31 18:10:39,115 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 18:10:39,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:10:39,117 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:39,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 43 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:10:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 18:10:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 130. [2022-01-31 18:10:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-01-31 18:10:39,178 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 124 [2022-01-31 18:10:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:39,178 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-01-31 18:10:39,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 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) [2022-01-31 18:10:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-01-31 18:10:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 18:10:39,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:39,179 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:39,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:10:39,179 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:39,179 INFO L85 PathProgramCache]: Analyzing trace with hash -583522617, now seen corresponding path program 56 times [2022-01-31 18:10:39,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053895638] [2022-01-31 18:10:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:39,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:39,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:39,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:39,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:40,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:40,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053895638] [2022-01-31 18:10:40,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053895638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:40,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:40,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:10:40,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039068891] [2022-01-31 18:10:40,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:40,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:10:40,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:10:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:10:40,399 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:44,443 INFO L93 Difference]: Finished difference Result 371 states and 433 transitions. [2022-01-31 18:10:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:10:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 18:10:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:44,445 INFO L225 Difference]: With dead ends: 371 [2022-01-31 18:10:44,445 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 18:10:44,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:10:44,447 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:44,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 43 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:10:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 18:10:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 132. [2022-01-31 18:10:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-01-31 18:10:44,511 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 126 [2022-01-31 18:10:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:44,511 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-01-31 18:10:44,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-01-31 18:10:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 18:10:44,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:44,513 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:44,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:10:44,513 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:44,513 INFO L85 PathProgramCache]: Analyzing trace with hash 620186342, now seen corresponding path program 57 times [2022-01-31 18:10:44,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:44,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404696204] [2022-01-31 18:10:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:44,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:44,515 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:44,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:44,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:45,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:45,768 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:45,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404696204] [2022-01-31 18:10:45,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1404696204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:45,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:45,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:10:45,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126806223] [2022-01-31 18:10:45,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:45,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:10:45,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:10:45,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:10:45,770 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 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) [2022-01-31 18:10:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:50,120 INFO L93 Difference]: Finished difference Result 377 states and 440 transitions. [2022-01-31 18:10:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:10:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 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 128 [2022-01-31 18:10:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:50,121 INFO L225 Difference]: With dead ends: 377 [2022-01-31 18:10:50,121 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 18:10:50,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:10:50,122 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 281 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:50,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 38 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:10:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 18:10:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 134. [2022-01-31 18:10:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-01-31 18:10:50,171 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 128 [2022-01-31 18:10:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:50,171 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-01-31 18:10:50,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 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) [2022-01-31 18:10:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-01-31 18:10:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 18:10:50,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:50,172 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:50,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:10:50,172 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1366990247, now seen corresponding path program 58 times [2022-01-31 18:10:50,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:50,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856196479] [2022-01-31 18:10:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:50,173 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:50,173 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:50,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:50,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:51,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:51,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:51,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856196479] [2022-01-31 18:10:51,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [856196479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:51,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:51,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:10:51,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159932923] [2022-01-31 18:10:51,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:51,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:10:51,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:10:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:10:51,463 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:55,781 INFO L93 Difference]: Finished difference Result 383 states and 447 transitions. [2022-01-31 18:10:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:10:55,781 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 18:10:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:55,782 INFO L225 Difference]: With dead ends: 383 [2022-01-31 18:10:55,782 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 18:10:55,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:10:55,783 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 240 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:55,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 53 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:10:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 18:10:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 136. [2022-01-31 18:10:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:10:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-01-31 18:10:55,829 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 130 [2022-01-31 18:10:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:55,830 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-01-31 18:10:55,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:10:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-01-31 18:10:55,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 18:10:55,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:55,830 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:55,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:10:55,830 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1844521466, now seen corresponding path program 59 times [2022-01-31 18:10:55,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:55,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894542662] [2022-01-31 18:10:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:55,832 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:55,832 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:55,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:55,837 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:57,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:10:57,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:57,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894542662] [2022-01-31 18:10:57,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894542662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:57,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:57,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:10:57,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029659802] [2022-01-31 18:10:57,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:57,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:10:57,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:57,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:10:57,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:10:57,160 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 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) [2022-01-31 18:11:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:01,663 INFO L93 Difference]: Finished difference Result 389 states and 454 transitions. [2022-01-31 18:11:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:11:01,664 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 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 132 [2022-01-31 18:11:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:01,665 INFO L225 Difference]: With dead ends: 389 [2022-01-31 18:11:01,666 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 18:11:01,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:11:01,667 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 294 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:01,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 38 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:11:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 18:11:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 138. [2022-01-31 18:11:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2022-01-31 18:11:01,716 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 132 [2022-01-31 18:11:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:01,716 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2022-01-31 18:11:01,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 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) [2022-01-31 18:11:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2022-01-31 18:11:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 18:11:01,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:01,717 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:01,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:11:01,717 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:01,718 INFO L85 PathProgramCache]: Analyzing trace with hash -902947705, now seen corresponding path program 60 times [2022-01-31 18:11:01,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:01,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811887900] [2022-01-31 18:11:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:01,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:01,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:01,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:01,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:03,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:03,075 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:03,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811887900] [2022-01-31 18:11:03,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811887900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:03,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:03,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:11:03,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175355438] [2022-01-31 18:11:03,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:03,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:11:03,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:11:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:11:03,077 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:07,867 INFO L93 Difference]: Finished difference Result 395 states and 461 transitions. [2022-01-31 18:11:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:11:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-01-31 18:11:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:07,869 INFO L225 Difference]: With dead ends: 395 [2022-01-31 18:11:07,869 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 18:11:07,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:11:07,870 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 272 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:07,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 48 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [898 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:11:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 18:11:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 140. [2022-01-31 18:11:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-01-31 18:11:07,919 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 134 [2022-01-31 18:11:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:07,919 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-01-31 18:11:07,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-01-31 18:11:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 18:11:07,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:07,920 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:07,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:11:07,920 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 584276262, now seen corresponding path program 61 times [2022-01-31 18:11:07,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919608396] [2022-01-31 18:11:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:07,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:07,922 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:07,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:07,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:09,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:09,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:09,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919608396] [2022-01-31 18:11:09,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919608396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:09,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:09,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:11:09,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481868702] [2022-01-31 18:11:09,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:09,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:11:09,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:09,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:11:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:11:09,278 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 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) [2022-01-31 18:11:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:14,205 INFO L93 Difference]: Finished difference Result 401 states and 468 transitions. [2022-01-31 18:11:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:11:14,205 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 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 136 [2022-01-31 18:11:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:14,206 INFO L225 Difference]: With dead ends: 401 [2022-01-31 18:11:14,206 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 18:11:14,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:11:14,208 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 316 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1031 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:14,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 53 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1031 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:11:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 18:11:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 142. [2022-01-31 18:11:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-01-31 18:11:14,262 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2022-01-31 18:11:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:14,262 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-01-31 18:11:14,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 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) [2022-01-31 18:11:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-01-31 18:11:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 18:11:14,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:14,263 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:14,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:11:14,263 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1550802073, now seen corresponding path program 62 times [2022-01-31 18:11:14,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:14,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085584034] [2022-01-31 18:11:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:14,265 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:14,265 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:14,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:14,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:15,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:15,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:15,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085584034] [2022-01-31 18:11:15,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085584034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:15,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:15,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:11:15,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484104293] [2022-01-31 18:11:15,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:15,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:11:15,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:11:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:11:15,643 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:20,762 INFO L93 Difference]: Finished difference Result 407 states and 475 transitions. [2022-01-31 18:11:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:11:20,763 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 18:11:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:20,764 INFO L225 Difference]: With dead ends: 407 [2022-01-31 18:11:20,764 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 18:11:20,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:11:20,765 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 300 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:20,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 58 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [985 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:11:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 18:11:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 144. [2022-01-31 18:11:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:20,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2022-01-31 18:11:20,821 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 138 [2022-01-31 18:11:20,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:20,821 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2022-01-31 18:11:20,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2022-01-31 18:11:20,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 18:11:20,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:20,822 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:20,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:11:20,822 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:20,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:20,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1136208826, now seen corresponding path program 63 times [2022-01-31 18:11:20,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:20,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71531872] [2022-01-31 18:11:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:20,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:20,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:20,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:20,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:22,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:22,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71531872] [2022-01-31 18:11:22,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [71531872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:22,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:22,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:11:22,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733709151] [2022-01-31 18:11:22,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:22,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:11:22,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:22,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:11:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:11:22,267 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 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) [2022-01-31 18:11:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:27,725 INFO L93 Difference]: Finished difference Result 413 states and 482 transitions. [2022-01-31 18:11:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:11:27,725 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 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 140 [2022-01-31 18:11:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:27,727 INFO L225 Difference]: With dead ends: 413 [2022-01-31 18:11:27,727 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 18:11:27,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:11:27,728 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 356 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 1157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:27,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 33 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1157 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:11:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 18:11:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 146. [2022-01-31 18:11:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2022-01-31 18:11:27,809 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 140 [2022-01-31 18:11:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:27,809 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2022-01-31 18:11:27,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 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) [2022-01-31 18:11:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2022-01-31 18:11:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 18:11:27,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:27,810 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:27,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:11:27,811 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:27,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash -228576697, now seen corresponding path program 64 times [2022-01-31 18:11:27,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:27,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700257777] [2022-01-31 18:11:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:27,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:27,812 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:27,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:27,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:29,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:29,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700257777] [2022-01-31 18:11:29,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700257777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:29,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:29,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:11:29,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998746459] [2022-01-31 18:11:29,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:29,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:11:29,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:29,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:11:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:11:29,361 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:35,024 INFO L93 Difference]: Finished difference Result 419 states and 489 transitions. [2022-01-31 18:11:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:11:35,024 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 18:11:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:35,026 INFO L225 Difference]: With dead ends: 419 [2022-01-31 18:11:35,026 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 18:11:35,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:11:35,027 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 331 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 1083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1083 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:35,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 43 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1083 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:11:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 18:11:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 148. [2022-01-31 18:11:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-01-31 18:11:35,086 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 142 [2022-01-31 18:11:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:35,086 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-01-31 18:11:35,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-01-31 18:11:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 18:11:35,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:35,087 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:35,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:11:35,087 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash -622114970, now seen corresponding path program 65 times [2022-01-31 18:11:35,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:35,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985488165] [2022-01-31 18:11:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:35,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:35,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:35,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:35,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:36,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:36,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:36,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985488165] [2022-01-31 18:11:36,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985488165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:36,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:36,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:11:36,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277207232] [2022-01-31 18:11:36,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:36,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:11:36,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:11:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:11:36,633 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 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) [2022-01-31 18:11:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:42,514 INFO L93 Difference]: Finished difference Result 425 states and 496 transitions. [2022-01-31 18:11:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:11:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 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 144 [2022-01-31 18:11:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:42,516 INFO L225 Difference]: With dead ends: 425 [2022-01-31 18:11:42,516 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 18:11:42,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:11:42,517 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 316 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 1042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1042 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:42,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 53 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1042 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:11:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 18:11:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 150. [2022-01-31 18:11:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2022-01-31 18:11:42,578 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 144 [2022-01-31 18:11:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:42,578 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2022-01-31 18:11:42,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 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) [2022-01-31 18:11:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2022-01-31 18:11:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 18:11:42,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:42,579 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:42,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:11:42,579 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1675282727, now seen corresponding path program 66 times [2022-01-31 18:11:42,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:42,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243434612] [2022-01-31 18:11:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:42,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:42,581 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:42,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:42,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:44,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:44,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243434612] [2022-01-31 18:11:44,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [243434612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:44,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:44,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:11:44,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655306363] [2022-01-31 18:11:44,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:44,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:11:44,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:11:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:11:44,150 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:50,203 INFO L93 Difference]: Finished difference Result 431 states and 503 transitions. [2022-01-31 18:11:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:11:50,204 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 18:11:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:50,205 INFO L225 Difference]: With dead ends: 431 [2022-01-31 18:11:50,205 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 18:11:50,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:11:50,206 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 355 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:50,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 33 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:11:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 18:11:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 152. [2022-01-31 18:11:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2022-01-31 18:11:50,269 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 146 [2022-01-31 18:11:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:50,269 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2022-01-31 18:11:50,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:11:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2022-01-31 18:11:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 18:11:50,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:50,270 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:50,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:11:50,270 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:50,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1295863162, now seen corresponding path program 67 times [2022-01-31 18:11:50,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:50,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962381417] [2022-01-31 18:11:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:50,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:50,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:50,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:50,278 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:51,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:51,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:51,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962381417] [2022-01-31 18:11:51,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [962381417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:51,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:51,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:11:51,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571471203] [2022-01-31 18:11:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:51,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:11:51,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:11:51,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:11:51,860 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 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) [2022-01-31 18:11:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:58,154 INFO L93 Difference]: Finished difference Result 437 states and 510 transitions. [2022-01-31 18:11:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:11:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 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 148 [2022-01-31 18:11:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:58,156 INFO L225 Difference]: With dead ends: 437 [2022-01-31 18:11:58,156 INFO L226 Difference]: Without dead ends: 358 [2022-01-31 18:11:58,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:11:58,157 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 389 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 1262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:58,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 38 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1262 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:11:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-31 18:11:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 154. [2022-01-31 18:11:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:11:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2022-01-31 18:11:58,216 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 148 [2022-01-31 18:11:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:58,216 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2022-01-31 18:11:58,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 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) [2022-01-31 18:11:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2022-01-31 18:11:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 18:11:58,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:58,217 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:58,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:11:58,217 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash 499017735, now seen corresponding path program 68 times [2022-01-31 18:11:58,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:58,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767719675] [2022-01-31 18:11:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:58,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:58,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:58,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:58,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:59,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:11:59,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767719675] [2022-01-31 18:11:59,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [767719675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:59,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:59,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:11:59,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282963826] [2022-01-31 18:11:59,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:59,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:11:59,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:11:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:11:59,850 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:06,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:06,316 INFO L93 Difference]: Finished difference Result 443 states and 517 transitions. [2022-01-31 18:12:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:12:06,316 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 18:12:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:06,317 INFO L225 Difference]: With dead ends: 443 [2022-01-31 18:12:06,317 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 18:12:06,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2413 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:12:06,319 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 341 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 1120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1120 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:06,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 38 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1120 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:12:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 18:12:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 156. [2022-01-31 18:12:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-01-31 18:12:06,382 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 150 [2022-01-31 18:12:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:06,382 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-01-31 18:12:06,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-01-31 18:12:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 18:12:06,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:06,383 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:06,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:12:06,383 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:06,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1330582950, now seen corresponding path program 69 times [2022-01-31 18:12:06,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:06,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899011818] [2022-01-31 18:12:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:06,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:06,384 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:06,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:06,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:08,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:08,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:08,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899011818] [2022-01-31 18:12:08,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [899011818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:08,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:08,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:12:08,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103989491] [2022-01-31 18:12:08,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:08,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:12:08,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:12:08,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:12:08,066 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 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) [2022-01-31 18:12:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:14,874 INFO L93 Difference]: Finished difference Result 449 states and 524 transitions. [2022-01-31 18:12:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:12:14,874 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 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 152 [2022-01-31 18:12:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:14,876 INFO L225 Difference]: With dead ends: 449 [2022-01-31 18:12:14,876 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 18:12:14,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:12:14,878 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 332 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 1096 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1096 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:14,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 53 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1096 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:12:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 18:12:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 158. [2022-01-31 18:12:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2022-01-31 18:12:14,949 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 152 [2022-01-31 18:12:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:14,949 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2022-01-31 18:12:14,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 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) [2022-01-31 18:12:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2022-01-31 18:12:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 18:12:14,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:14,950 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:14,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:12:14,950 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1639379225, now seen corresponding path program 70 times [2022-01-31 18:12:14,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:14,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412798339] [2022-01-31 18:12:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:14,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:14,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:14,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:14,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:16,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:16,674 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412798339] [2022-01-31 18:12:16,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412798339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:16,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:16,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:12:16,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067782739] [2022-01-31 18:12:16,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:16,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:12:16,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:12:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:12:16,680 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:23,753 INFO L93 Difference]: Finished difference Result 455 states and 531 transitions. [2022-01-31 18:12:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:12:23,753 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-01-31 18:12:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:23,755 INFO L225 Difference]: With dead ends: 455 [2022-01-31 18:12:23,755 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 18:12:23,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:12:23,757 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 365 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1197 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:23,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 43 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1197 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:12:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 18:12:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 160. [2022-01-31 18:12:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-01-31 18:12:23,839 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 154 [2022-01-31 18:12:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:23,839 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-01-31 18:12:23,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-01-31 18:12:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 18:12:23,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:23,840 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:23,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:12:23,840 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1282248506, now seen corresponding path program 71 times [2022-01-31 18:12:23,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338703211] [2022-01-31 18:12:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:23,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:23,842 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:23,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:23,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:25,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:25,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338703211] [2022-01-31 18:12:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [338703211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:25,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:25,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:12:25,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190838720] [2022-01-31 18:12:25,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:25,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:12:25,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:12:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:12:25,595 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 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) [2022-01-31 18:12:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:33,029 INFO L93 Difference]: Finished difference Result 461 states and 538 transitions. [2022-01-31 18:12:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:12:33,030 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 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 156 [2022-01-31 18:12:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:33,031 INFO L225 Difference]: With dead ends: 461 [2022-01-31 18:12:33,031 INFO L226 Difference]: Without dead ends: 378 [2022-01-31 18:12:33,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:12:33,032 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 304 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 1020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1020 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:33,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 58 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1020 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:12:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-31 18:12:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 162. [2022-01-31 18:12:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2022-01-31 18:12:33,130 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 156 [2022-01-31 18:12:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:33,131 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2022-01-31 18:12:33,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 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) [2022-01-31 18:12:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2022-01-31 18:12:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 18:12:33,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:33,131 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:33,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:12:33,132 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:33,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1674003001, now seen corresponding path program 72 times [2022-01-31 18:12:33,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:33,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635685553] [2022-01-31 18:12:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:33,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:33,133 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:33,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:33,140 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:34,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:34,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635685553] [2022-01-31 18:12:34,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [635685553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:34,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:34,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:12:34,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497092363] [2022-01-31 18:12:34,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:34,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:12:34,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:12:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:12:34,943 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:42,535 INFO L93 Difference]: Finished difference Result 467 states and 545 transitions. [2022-01-31 18:12:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:12:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 18:12:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:42,537 INFO L225 Difference]: With dead ends: 467 [2022-01-31 18:12:42,537 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 18:12:42,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:12:42,538 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 305 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:42,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 53 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:12:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 18:12:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 164. [2022-01-31 18:12:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-01-31 18:12:42,610 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 158 [2022-01-31 18:12:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:42,610 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-01-31 18:12:42,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-01-31 18:12:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 18:12:42,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:42,611 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:42,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:12:42,611 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash -99695642, now seen corresponding path program 73 times [2022-01-31 18:12:42,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444601059] [2022-01-31 18:12:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:42,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:42,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:42,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:42,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:44,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:44,481 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444601059] [2022-01-31 18:12:44,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444601059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:44,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:44,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:12:44,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066882801] [2022-01-31 18:12:44,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:44,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:12:44,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:44,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:12:44,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:12:44,483 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 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) [2022-01-31 18:12:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:52,377 INFO L93 Difference]: Finished difference Result 473 states and 552 transitions. [2022-01-31 18:12:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:12:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 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 160 [2022-01-31 18:12:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:52,379 INFO L225 Difference]: With dead ends: 473 [2022-01-31 18:12:52,379 INFO L226 Difference]: Without dead ends: 388 [2022-01-31 18:12:52,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:12:52,380 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 340 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1128 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:52,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 43 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1128 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:12:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-31 18:12:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 166. [2022-01-31 18:12:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-01-31 18:12:52,455 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 160 [2022-01-31 18:12:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:52,456 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-01-31 18:12:52,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 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) [2022-01-31 18:12:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-01-31 18:12:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 18:12:52,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:52,456 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:52,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:12:52,456 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash -422873945, now seen corresponding path program 74 times [2022-01-31 18:12:52,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:52,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144275894] [2022-01-31 18:12:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:52,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:52,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:52,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:52,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:54,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:54,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:54,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144275894] [2022-01-31 18:12:54,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144275894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:54,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:54,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:12:54,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148205937] [2022-01-31 18:12:54,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:54,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:12:54,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:12:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:12:54,355 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:02,782 INFO L93 Difference]: Finished difference Result 479 states and 559 transitions. [2022-01-31 18:13:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:13:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-01-31 18:13:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:02,784 INFO L225 Difference]: With dead ends: 479 [2022-01-31 18:13:02,784 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 18:13:02,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:13:02,785 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 343 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 1139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1139 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:02,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 48 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1139 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:13:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 18:13:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 168. [2022-01-31 18:13:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2022-01-31 18:13:02,883 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 162 [2022-01-31 18:13:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:02,883 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2022-01-31 18:13:02,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2022-01-31 18:13:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 18:13:02,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:02,884 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:02,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:13:02,885 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1959137030, now seen corresponding path program 75 times [2022-01-31 18:13:02,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067505947] [2022-01-31 18:13:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:02,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:02,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:02,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:02,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:04,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:04,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067505947] [2022-01-31 18:13:04,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067505947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:04,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:04,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:13:04,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039511267] [2022-01-31 18:13:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:04,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:13:04,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:04,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:13:04,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:13:04,876 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 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) [2022-01-31 18:13:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:13,720 INFO L93 Difference]: Finished difference Result 485 states and 566 transitions. [2022-01-31 18:13:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:13:13,721 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 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 164 [2022-01-31 18:13:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:13,722 INFO L225 Difference]: With dead ends: 485 [2022-01-31 18:13:13,722 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 18:13:13,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:13:13,723 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 326 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:13,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 48 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:13:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 18:13:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 170. [2022-01-31 18:13:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2022-01-31 18:13:13,839 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 164 [2022-01-31 18:13:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:13,839 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2022-01-31 18:13:13,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 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) [2022-01-31 18:13:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2022-01-31 18:13:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 18:13:13,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:13,841 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:13,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:13:13,841 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1170158471, now seen corresponding path program 76 times [2022-01-31 18:13:13,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:13,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921680143] [2022-01-31 18:13:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:13,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:13,843 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:13,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:13,851 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:15,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:15,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:15,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921680143] [2022-01-31 18:13:15,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [921680143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:15,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:15,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:13:15,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915767428] [2022-01-31 18:13:15,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:15,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:13:15,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:13:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:13:15,826 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:24,813 INFO L93 Difference]: Finished difference Result 491 states and 573 transitions. [2022-01-31 18:13:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:13:24,813 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 18:13:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:24,814 INFO L225 Difference]: With dead ends: 491 [2022-01-31 18:13:24,814 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 18:13:24,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:13:24,816 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 348 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 1157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:24,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 63 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1157 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:13:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 18:13:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 172. [2022-01-31 18:13:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-01-31 18:13:24,906 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 166 [2022-01-31 18:13:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:24,906 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-01-31 18:13:24,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-01-31 18:13:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 18:13:24,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:24,907 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:24,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:13:24,907 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:24,908 INFO L85 PathProgramCache]: Analyzing trace with hash -851815898, now seen corresponding path program 77 times [2022-01-31 18:13:24,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:24,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214335244] [2022-01-31 18:13:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:24,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:24,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:24,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:24,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:26,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:26,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214335244] [2022-01-31 18:13:26,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214335244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:26,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:26,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:13:26,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512627959] [2022-01-31 18:13:26,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:26,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:13:26,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:26,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:13:26,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:13:26,954 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 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) [2022-01-31 18:13:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:36,354 INFO L93 Difference]: Finished difference Result 497 states and 580 transitions. [2022-01-31 18:13:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:13:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 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 168 [2022-01-31 18:13:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:36,356 INFO L225 Difference]: With dead ends: 497 [2022-01-31 18:13:36,356 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 18:13:36,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:13:36,357 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 449 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:36,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 28 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:13:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 18:13:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 174. [2022-01-31 18:13:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.0178571428571428) internal successors, (171), 168 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2022-01-31 18:13:36,440 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 168 [2022-01-31 18:13:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:36,440 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2022-01-31 18:13:36,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 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) [2022-01-31 18:13:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2022-01-31 18:13:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 18:13:36,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:36,441 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:36,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:13:36,442 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1498544743, now seen corresponding path program 78 times [2022-01-31 18:13:36,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:36,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722798582] [2022-01-31 18:13:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:36,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:36,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:36,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:36,452 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:38,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:38,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:38,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722798582] [2022-01-31 18:13:38,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [722798582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:38,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:38,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:13:38,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264127307] [2022-01-31 18:13:38,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:38,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:13:38,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:38,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:13:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:13:38,522 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:48,065 INFO L93 Difference]: Finished difference Result 503 states and 587 transitions. [2022-01-31 18:13:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:13:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 18:13:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:48,067 INFO L225 Difference]: With dead ends: 503 [2022-01-31 18:13:48,067 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 18:13:48,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3158 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:13:48,069 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 378 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 1251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1251 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:48,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 58 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1251 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:13:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 18:13:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 176. [2022-01-31 18:13:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:13:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2022-01-31 18:13:48,153 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 170 [2022-01-31 18:13:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:48,154 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2022-01-31 18:13:48,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:13:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2022-01-31 18:13:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 18:13:48,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:48,155 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:48,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:13:48,155 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash 611159366, now seen corresponding path program 79 times [2022-01-31 18:13:48,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:48,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271346571] [2022-01-31 18:13:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:48,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:48,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:48,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:48,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:50,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:50,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:50,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271346571] [2022-01-31 18:13:50,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271346571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:50,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:50,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:13:50,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954382888] [2022-01-31 18:13:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:50,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:13:50,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:13:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:13:50,326 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 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) [2022-01-31 18:14:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:00,338 INFO L93 Difference]: Finished difference Result 509 states and 594 transitions. [2022-01-31 18:14:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:14:00,339 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 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 172 [2022-01-31 18:14:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:00,340 INFO L225 Difference]: With dead ends: 509 [2022-01-31 18:14:00,340 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 18:14:00,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:14:00,341 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 383 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 1268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1268 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:00,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 43 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1268 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:14:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 18:14:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 178. [2022-01-31 18:14:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2022-01-31 18:14:00,431 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 172 [2022-01-31 18:14:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:00,431 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2022-01-31 18:14:00,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 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) [2022-01-31 18:14:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2022-01-31 18:14:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 18:14:00,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:00,432 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:14:00,432 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2051131719, now seen corresponding path program 80 times [2022-01-31 18:14:00,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:00,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335642477] [2022-01-31 18:14:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:00,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:00,433 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:00,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:00,441 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:02,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:02,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335642477] [2022-01-31 18:14:02,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [335642477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:02,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:02,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:14:02,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989752619] [2022-01-31 18:14:02,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:02,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:14:02,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:14:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:14:02,648 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:13,296 INFO L93 Difference]: Finished difference Result 515 states and 601 transitions. [2022-01-31 18:14:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:14:13,297 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 18:14:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:13,298 INFO L225 Difference]: With dead ends: 515 [2022-01-31 18:14:13,298 INFO L226 Difference]: Without dead ends: 423 [2022-01-31 18:14:13,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:14:13,299 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 447 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:13,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 43 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:14:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-31 18:14:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 180. [2022-01-31 18:14:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2022-01-31 18:14:13,394 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 174 [2022-01-31 18:14:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:13,394 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2022-01-31 18:14:13,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2022-01-31 18:14:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 18:14:13,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:13,395 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:13,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:14:13,396 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash 853655654, now seen corresponding path program 81 times [2022-01-31 18:14:13,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997216489] [2022-01-31 18:14:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:13,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:13,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:13,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:13,405 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:15,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:15,689 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:15,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997216489] [2022-01-31 18:14:15,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1997216489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:15,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:15,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:14:15,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767525051] [2022-01-31 18:14:15,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:15,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:14:15,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:14:15,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:14:15,691 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 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) [2022-01-31 18:14:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:26,584 INFO L93 Difference]: Finished difference Result 521 states and 608 transitions. [2022-01-31 18:14:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:14:26,585 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 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 176 [2022-01-31 18:14:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:26,586 INFO L225 Difference]: With dead ends: 521 [2022-01-31 18:14:26,586 INFO L226 Difference]: Without dead ends: 428 [2022-01-31 18:14:26,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:14:26,588 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 412 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 1359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1359 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:26,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 48 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1359 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:14:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-31 18:14:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 182. [2022-01-31 18:14:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2022-01-31 18:14:26,704 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 176 [2022-01-31 18:14:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:26,704 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2022-01-31 18:14:26,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 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) [2022-01-31 18:14:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2022-01-31 18:14:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 18:14:26,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:26,705 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:26,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:14:26,706 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1714642905, now seen corresponding path program 82 times [2022-01-31 18:14:26,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:26,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561125680] [2022-01-31 18:14:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:26,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:26,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:26,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:26,719 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:29,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561125680] [2022-01-31 18:14:29,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561125680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:29,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:29,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:14:29,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890818078] [2022-01-31 18:14:29,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:29,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:14:29,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:14:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:14:29,099 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:40,184 INFO L93 Difference]: Finished difference Result 527 states and 615 transitions. [2022-01-31 18:14:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:14:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-01-31 18:14:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:40,186 INFO L225 Difference]: With dead ends: 527 [2022-01-31 18:14:40,186 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 18:14:40,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:14:40,188 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 386 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:40,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 33 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:14:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 18:14:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 184. [2022-01-31 18:14:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2022-01-31 18:14:40,298 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 178 [2022-01-31 18:14:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:40,298 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2022-01-31 18:14:40,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2022-01-31 18:14:40,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 18:14:40,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:40,299 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:40,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:14:40,299 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1754852230, now seen corresponding path program 83 times [2022-01-31 18:14:40,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:40,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385199705] [2022-01-31 18:14:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:40,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:40,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:40,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:40,311 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:42,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:42,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385199705] [2022-01-31 18:14:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385199705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:42,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:42,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:14:42,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876256820] [2022-01-31 18:14:42,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:42,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:14:42,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:14:42,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:14:42,667 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 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) [2022-01-31 18:14:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:54,132 INFO L93 Difference]: Finished difference Result 533 states and 622 transitions. [2022-01-31 18:14:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:14:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 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 180 [2022-01-31 18:14:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:54,134 INFO L225 Difference]: With dead ends: 533 [2022-01-31 18:14:54,134 INFO L226 Difference]: Without dead ends: 438 [2022-01-31 18:14:54,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:14:54,135 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 420 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:54,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 48 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:14:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-31 18:14:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 186. [2022-01-31 18:14:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2022-01-31 18:14:54,236 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 180 [2022-01-31 18:14:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:54,236 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2022-01-31 18:14:54,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 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) [2022-01-31 18:14:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2022-01-31 18:14:54,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 18:14:54,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:54,237 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:54,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:14:54,237 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:54,238 INFO L85 PathProgramCache]: Analyzing trace with hash 565214983, now seen corresponding path program 84 times [2022-01-31 18:14:54,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:54,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559985324] [2022-01-31 18:14:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:54,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:54,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:54,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:54,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:56,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:56,626 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:56,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559985324] [2022-01-31 18:14:56,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [559985324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:56,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:56,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:14:56,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104099786] [2022-01-31 18:14:56,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:56,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:14:56,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:14:56,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:14:56,629 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:08,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:08,641 INFO L93 Difference]: Finished difference Result 539 states and 629 transitions. [2022-01-31 18:15:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:15:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 18:15:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:08,642 INFO L225 Difference]: With dead ends: 539 [2022-01-31 18:15:08,643 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 18:15:08,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3653 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:15:08,644 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 360 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 1209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1209 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:08,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 73 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1209 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 18:15:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 188. [2022-01-31 18:15:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2022-01-31 18:15:08,756 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 182 [2022-01-31 18:15:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:08,757 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2022-01-31 18:15:08,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2022-01-31 18:15:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 18:15:08,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:08,757 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:08,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:15:08,758 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:08,758 INFO L85 PathProgramCache]: Analyzing trace with hash 219483814, now seen corresponding path program 85 times [2022-01-31 18:15:08,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:08,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424326762] [2022-01-31 18:15:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:08,759 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:08,759 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:08,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:08,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:11,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:11,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:11,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424326762] [2022-01-31 18:15:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1424326762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:11,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:11,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:15:11,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689515979] [2022-01-31 18:15:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:11,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:15:11,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:15:11,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:15:11,249 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 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) [2022-01-31 18:15:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:23,791 INFO L93 Difference]: Finished difference Result 545 states and 636 transitions. [2022-01-31 18:15:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:15:23,791 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 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 184 [2022-01-31 18:15:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:23,793 INFO L225 Difference]: With dead ends: 545 [2022-01-31 18:15:23,793 INFO L226 Difference]: Without dead ends: 448 [2022-01-31 18:15:23,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:15:23,795 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 381 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 1274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:23,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 58 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1274 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-31 18:15:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 190. [2022-01-31 18:15:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.016304347826087) internal successors, (187), 184 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2022-01-31 18:15:23,898 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 184 [2022-01-31 18:15:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:23,898 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2022-01-31 18:15:23,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 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) [2022-01-31 18:15:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2022-01-31 18:15:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 18:15:23,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:23,899 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:23,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:15:23,899 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:23,899 INFO L85 PathProgramCache]: Analyzing trace with hash -735353369, now seen corresponding path program 86 times [2022-01-31 18:15:23,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:23,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194655686] [2022-01-31 18:15:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:23,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:23,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:23,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:23,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:26,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:26,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:26,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194655686] [2022-01-31 18:15:26,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194655686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:26,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:26,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:15:26,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75198823] [2022-01-31 18:15:26,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:26,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:15:26,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:15:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:15:26,410 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:39,149 INFO L93 Difference]: Finished difference Result 551 states and 643 transitions. [2022-01-31 18:15:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:15:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 18:15:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:39,151 INFO L225 Difference]: With dead ends: 551 [2022-01-31 18:15:39,151 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 18:15:39,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3826 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:15:39,153 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 407 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 1354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1354 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:39,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 53 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1354 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 18:15:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 192. [2022-01-31 18:15:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2022-01-31 18:15:39,308 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 186 [2022-01-31 18:15:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:39,308 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2022-01-31 18:15:39,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2022-01-31 18:15:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 18:15:39,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:39,309 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:39,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:15:39,309 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1599613382, now seen corresponding path program 87 times [2022-01-31 18:15:39,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:39,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421566181] [2022-01-31 18:15:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:39,311 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:39,311 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:39,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:39,322 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:41,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:41,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:41,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421566181] [2022-01-31 18:15:41,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [421566181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:41,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:41,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:15:41,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584951828] [2022-01-31 18:15:41,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:41,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:15:41,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:15:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:15:41,915 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 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) [2022-01-31 18:15:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:54,888 INFO L93 Difference]: Finished difference Result 557 states and 650 transitions. [2022-01-31 18:15:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:15:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 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 188 [2022-01-31 18:15:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:54,890 INFO L225 Difference]: With dead ends: 557 [2022-01-31 18:15:54,890 INFO L226 Difference]: Without dead ends: 458 [2022-01-31 18:15:54,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:15:54,891 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 434 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 1437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1437 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:54,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 48 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1437 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-31 18:15:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 194. [2022-01-31 18:15:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2022-01-31 18:15:55,008 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 188 [2022-01-31 18:15:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:55,008 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2022-01-31 18:15:55,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 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) [2022-01-31 18:15:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2022-01-31 18:15:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 18:15:55,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:55,009 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:55,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:15:55,010 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:55,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:55,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1409592121, now seen corresponding path program 88 times [2022-01-31 18:15:55,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:55,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768075796] [2022-01-31 18:15:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:55,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:55,011 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:55,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:55,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:57,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:57,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:57,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768075796] [2022-01-31 18:15:57,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768075796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:57,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:57,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:15:57,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050181247] [2022-01-31 18:15:57,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:57,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:15:57,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:15:57,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:15:57,610 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:10,971 INFO L93 Difference]: Finished difference Result 563 states and 657 transitions. [2022-01-31 18:16:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:16:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 18:16:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:10,972 INFO L225 Difference]: With dead ends: 563 [2022-01-31 18:16:10,972 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 18:16:10,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:16:10,974 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 503 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 1647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1647 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:10,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 33 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1647 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:16:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 18:16:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 196. [2022-01-31 18:16:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-01-31 18:16:11,083 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 190 [2022-01-31 18:16:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:11,084 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-01-31 18:16:11,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-01-31 18:16:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 18:16:11,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:11,085 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:11,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:16:11,085 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1243333402, now seen corresponding path program 89 times [2022-01-31 18:16:11,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:11,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530227248] [2022-01-31 18:16:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:11,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:11,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:11,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:11,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:13,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:13,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:13,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530227248] [2022-01-31 18:16:13,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530227248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:13,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:13,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:16:13,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802257212] [2022-01-31 18:16:13,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:13,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:16:13,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:13,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:16:13,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:16:13,755 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 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) [2022-01-31 18:16:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:27,458 INFO L93 Difference]: Finished difference Result 569 states and 664 transitions. [2022-01-31 18:16:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:16:27,458 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 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 192 [2022-01-31 18:16:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:27,460 INFO L225 Difference]: With dead ends: 569 [2022-01-31 18:16:27,460 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 18:16:27,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:16:27,461 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 427 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 1421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1421 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:27,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 53 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1421 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 18:16:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 198. [2022-01-31 18:16:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2022-01-31 18:16:27,575 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 192 [2022-01-31 18:16:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:27,575 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2022-01-31 18:16:27,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 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) [2022-01-31 18:16:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2022-01-31 18:16:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 18:16:27,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:27,576 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:27,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:16:27,576 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1134670937, now seen corresponding path program 90 times [2022-01-31 18:16:27,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295993784] [2022-01-31 18:16:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:27,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:27,577 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:27,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:27,586 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:30,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:30,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:30,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295993784] [2022-01-31 18:16:30,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [295993784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:30,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:30,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:16:30,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107119846] [2022-01-31 18:16:30,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:30,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:16:30,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:16:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:16:30,301 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:44,585 INFO L93 Difference]: Finished difference Result 575 states and 671 transitions. [2022-01-31 18:16:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:16:44,585 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-01-31 18:16:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:44,587 INFO L225 Difference]: With dead ends: 575 [2022-01-31 18:16:44,587 INFO L226 Difference]: Without dead ends: 473 [2022-01-31 18:16:44,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:16:44,588 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 452 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 1500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1500 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:44,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 38 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1500 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-31 18:16:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 200. [2022-01-31 18:16:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2022-01-31 18:16:44,736 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 194 [2022-01-31 18:16:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:44,736 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2022-01-31 18:16:44,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2022-01-31 18:16:44,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 18:16:44,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:44,737 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:44,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:16:44,737 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1631893498, now seen corresponding path program 91 times [2022-01-31 18:16:44,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:44,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812111173] [2022-01-31 18:16:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:44,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:44,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:44,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:44,746 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:47,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:47,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:47,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812111173] [2022-01-31 18:16:47,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [812111173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:47,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:47,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:16:47,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142262555] [2022-01-31 18:16:47,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:47,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:16:47,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:16:47,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:16:47,536 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 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) [2022-01-31 18:17:02,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:02,192 INFO L93 Difference]: Finished difference Result 581 states and 678 transitions. [2022-01-31 18:17:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:17:02,193 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 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 196 [2022-01-31 18:17:02,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:02,195 INFO L225 Difference]: With dead ends: 581 [2022-01-31 18:17:02,195 INFO L226 Difference]: Without dead ends: 478 [2022-01-31 18:17:02,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:17:02,196 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 572 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 1862 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1862 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:02,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 28 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1862 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:02,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-31 18:17:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 202. [2022-01-31 18:17:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2022-01-31 18:17:02,319 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 196 [2022-01-31 18:17:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:02,319 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2022-01-31 18:17:02,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 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) [2022-01-31 18:17:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2022-01-31 18:17:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 18:17:02,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:02,320 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:02,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:17:02,320 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash 286411399, now seen corresponding path program 92 times [2022-01-31 18:17:02,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:02,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184562040] [2022-01-31 18:17:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:02,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:02,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:02,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:02,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:05,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:05,167 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:05,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184562040] [2022-01-31 18:17:05,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184562040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:05,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:05,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:17:05,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432051050] [2022-01-31 18:17:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:05,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:17:05,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:17:05,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:17:05,170 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:20,326 INFO L93 Difference]: Finished difference Result 587 states and 685 transitions. [2022-01-31 18:17:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:17:20,327 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-01-31 18:17:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:20,328 INFO L225 Difference]: With dead ends: 587 [2022-01-31 18:17:20,328 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 18:17:20,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:17:20,331 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 409 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 1372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1372 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:20,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 53 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1372 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 18:17:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 204. [2022-01-31 18:17:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2022-01-31 18:17:20,482 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 198 [2022-01-31 18:17:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:20,482 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2022-01-31 18:17:20,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2022-01-31 18:17:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 18:17:20,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:20,483 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:20,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:17:20,484 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash -10532058, now seen corresponding path program 93 times [2022-01-31 18:17:20,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:20,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222436768] [2022-01-31 18:17:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:20,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:20,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:20,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:20,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:23,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:23,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:23,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222436768] [2022-01-31 18:17:23,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222436768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:23,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:23,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:17:23,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980983277] [2022-01-31 18:17:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:23,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:17:23,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:23,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:17:23,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:17:23,393 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 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) [2022-01-31 18:17:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:39,326 INFO L93 Difference]: Finished difference Result 593 states and 692 transitions. [2022-01-31 18:17:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:17:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 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 200 [2022-01-31 18:17:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:39,329 INFO L225 Difference]: With dead ends: 593 [2022-01-31 18:17:39,329 INFO L226 Difference]: Without dead ends: 488 [2022-01-31 18:17:39,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:17:39,331 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 465 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:39,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 53 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-31 18:17:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 206. [2022-01-31 18:17:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2022-01-31 18:17:39,515 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 200 [2022-01-31 18:17:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:39,515 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2022-01-31 18:17:39,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 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) [2022-01-31 18:17:39,515 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2022-01-31 18:17:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 18:17:39,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:39,516 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:39,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:17:39,517 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:39,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1907011225, now seen corresponding path program 94 times [2022-01-31 18:17:39,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:39,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489692240] [2022-01-31 18:17:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:39,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:39,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:39,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:39,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:42,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:42,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:42,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489692240] [2022-01-31 18:17:42,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [489692240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:42,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:42,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:17:42,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261716914] [2022-01-31 18:17:42,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:42,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:17:42,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:17:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:17:42,565 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:58,945 INFO L93 Difference]: Finished difference Result 599 states and 699 transitions. [2022-01-31 18:17:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:17:58,946 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-01-31 18:17:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:58,947 INFO L225 Difference]: With dead ends: 599 [2022-01-31 18:17:58,948 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 18:17:58,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:17:58,950 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 453 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 1509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1509 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:58,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 53 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1509 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 18:17:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 208. [2022-01-31 18:17:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2022-01-31 18:17:59,080 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 202 [2022-01-31 18:17:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:59,080 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2022-01-31 18:17:59,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2022-01-31 18:17:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 18:17:59,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:59,081 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:59,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:17:59,081 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:59,081 INFO L85 PathProgramCache]: Analyzing trace with hash 886195782, now seen corresponding path program 95 times [2022-01-31 18:17:59,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:59,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163518078] [2022-01-31 18:17:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:59,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:59,083 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:59,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:59,092 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:02,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:02,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:02,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163518078] [2022-01-31 18:18:02,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [163518078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:02,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:02,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:18:02,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999083324] [2022-01-31 18:18:02,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:02,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:18:02,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:18:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:18:02,074 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 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) [2022-01-31 18:18:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:18,865 INFO L93 Difference]: Finished difference Result 605 states and 706 transitions. [2022-01-31 18:18:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:18:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 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 204 [2022-01-31 18:18:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:18,867 INFO L225 Difference]: With dead ends: 605 [2022-01-31 18:18:18,868 INFO L226 Difference]: Without dead ends: 498 [2022-01-31 18:18:18,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:18:18,870 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 413 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 1390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1390 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:18,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 73 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1390 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:18:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-31 18:18:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 210. [2022-01-31 18:18:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2022-01-31 18:18:18,998 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 204 [2022-01-31 18:18:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:18,998 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2022-01-31 18:18:18,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 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) [2022-01-31 18:18:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2022-01-31 18:18:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 18:18:18,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:18,999 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:18,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:18:18,999 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash -790273977, now seen corresponding path program 96 times [2022-01-31 18:18:19,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:19,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355510882] [2022-01-31 18:18:19,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:19,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:19,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:19,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:19,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:22,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:22,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355510882] [2022-01-31 18:18:22,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355510882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:22,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:22,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:18:22,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617011210] [2022-01-31 18:18:22,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:22,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:18:22,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:18:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:18:22,059 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:38,957 INFO L93 Difference]: Finished difference Result 611 states and 713 transitions. [2022-01-31 18:18:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:18:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 18:18:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:38,960 INFO L225 Difference]: With dead ends: 611 [2022-01-31 18:18:38,960 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 18:18:38,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4751 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:18:38,963 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 504 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 1665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1665 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:38,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 38 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1665 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:18:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 18:18:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 212. [2022-01-31 18:18:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2022-01-31 18:18:39,100 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 206 [2022-01-31 18:18:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:39,101 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2022-01-31 18:18:39,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2022-01-31 18:18:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 18:18:39,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:39,101 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:39,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:18:39,102 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:39,102 INFO L85 PathProgramCache]: Analyzing trace with hash 865483110, now seen corresponding path program 97 times [2022-01-31 18:18:39,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:39,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544192413] [2022-01-31 18:18:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:39,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:39,103 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:39,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:39,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:42,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:42,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:42,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544192413] [2022-01-31 18:18:42,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [544192413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:42,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:42,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:18:42,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513443534] [2022-01-31 18:18:42,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:42,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:18:42,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:18:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:18:42,225 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 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) [2022-01-31 18:18:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:59,889 INFO L93 Difference]: Finished difference Result 617 states and 720 transitions. [2022-01-31 18:18:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:18:59,890 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 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 208 [2022-01-31 18:18:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:59,892 INFO L225 Difference]: With dead ends: 617 [2022-01-31 18:18:59,892 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 18:18:59,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4849 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:18:59,895 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 653 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 2117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2117 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:59,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 48 Invalid, 3012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2117 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:18:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 18:19:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 214. [2022-01-31 18:19:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.0144230769230769) internal successors, (211), 208 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2022-01-31 18:19:00,047 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 208 [2022-01-31 18:19:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:00,048 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2022-01-31 18:19:00,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 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) [2022-01-31 18:19:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2022-01-31 18:19:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 18:19:00,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:00,049 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:00,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:19:00,049 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash 234911527, now seen corresponding path program 98 times [2022-01-31 18:19:00,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:00,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437226401] [2022-01-31 18:19:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:00,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:00,051 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:00,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:00,062 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:03,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:03,217 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:03,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437226401] [2022-01-31 18:19:03,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [437226401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:03,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:03,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:19:03,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551390964] [2022-01-31 18:19:03,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:03,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:19:03,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:19:03,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:19:03,220 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:21,418 INFO L93 Difference]: Finished difference Result 623 states and 727 transitions. [2022-01-31 18:19:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:19:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 18:19:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:21,420 INFO L225 Difference]: With dead ends: 623 [2022-01-31 18:19:21,420 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 18:19:21,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4948 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:19:21,423 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 496 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 1646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1646 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:21,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 43 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1646 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:19:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 18:19:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 216. [2022-01-31 18:19:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2022-01-31 18:19:21,571 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 210 [2022-01-31 18:19:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:21,571 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2022-01-31 18:19:21,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2022-01-31 18:19:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 18:19:21,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:21,572 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:21,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:19:21,572 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:21,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1481825146, now seen corresponding path program 99 times [2022-01-31 18:19:21,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:21,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861886423] [2022-01-31 18:19:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:21,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:21,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:21,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:21,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:24,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:24,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861886423] [2022-01-31 18:19:24,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [861886423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:24,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:24,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:19:24,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148559960] [2022-01-31 18:19:24,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:24,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:19:24,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:24,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:19:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:19:24,826 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 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) [2022-01-31 18:19:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:43,423 INFO L93 Difference]: Finished difference Result 629 states and 734 transitions. [2022-01-31 18:19:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:19:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 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 212 [2022-01-31 18:19:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:43,428 INFO L225 Difference]: With dead ends: 629 [2022-01-31 18:19:43,428 INFO L226 Difference]: Without dead ends: 518 [2022-01-31 18:19:43,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:19:43,431 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 434 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 1461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1461 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:43,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 58 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1461 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:19:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-31 18:19:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 218. [2022-01-31 18:19:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2022-01-31 18:19:43,573 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 212 [2022-01-31 18:19:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:43,573 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2022-01-31 18:19:43,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 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) [2022-01-31 18:19:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2022-01-31 18:19:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 18:19:43,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:43,574 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:43,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:19:43,574 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:43,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:43,574 INFO L85 PathProgramCache]: Analyzing trace with hash -211511801, now seen corresponding path program 100 times [2022-01-31 18:19:43,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:43,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322423938] [2022-01-31 18:19:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:43,575 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:43,575 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:43,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:43,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:46,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:46,887 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:46,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322423938] [2022-01-31 18:19:46,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322423938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:46,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:46,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:19:46,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567521785] [2022-01-31 18:19:46,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:46,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:19:46,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:46,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:19:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:19:46,891 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:06,327 INFO L93 Difference]: Finished difference Result 635 states and 741 transitions. [2022-01-31 18:20:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:20:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-01-31 18:20:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:06,328 INFO L225 Difference]: With dead ends: 635 [2022-01-31 18:20:06,328 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 18:20:06,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5149 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:20:06,330 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 528 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 1745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1745 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:06,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 53 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1745 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:20:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 18:20:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 220. [2022-01-31 18:20:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-01-31 18:20:06,475 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 214 [2022-01-31 18:20:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:06,476 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-01-31 18:20:06,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-01-31 18:20:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 18:20:06,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:06,476 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:06,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:20:06,477 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash 345573286, now seen corresponding path program 101 times [2022-01-31 18:20:06,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:06,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539931988] [2022-01-31 18:20:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:06,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:06,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:06,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:06,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:09,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:09,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:09,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539931988] [2022-01-31 18:20:09,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [539931988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:09,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:09,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:20:09,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667263022] [2022-01-31 18:20:09,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:09,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:20:09,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:09,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:20:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:20:09,852 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 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) [2022-01-31 18:20:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:29,838 INFO L93 Difference]: Finished difference Result 641 states and 748 transitions. [2022-01-31 18:20:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:20:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 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 216 [2022-01-31 18:20:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:29,843 INFO L225 Difference]: With dead ends: 641 [2022-01-31 18:20:29,843 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 18:20:29,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5251 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:20:29,846 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 471 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 1577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1577 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:29,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 83 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1577 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:20:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 18:20:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 222. [2022-01-31 18:20:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2022-01-31 18:20:30,034 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 216 [2022-01-31 18:20:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:30,034 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2022-01-31 18:20:30,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 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) [2022-01-31 18:20:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2022-01-31 18:20:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 18:20:30,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:30,035 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:30,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:20:30,035 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:30,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:30,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2024817433, now seen corresponding path program 102 times [2022-01-31 18:20:30,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:30,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25030270] [2022-01-31 18:20:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:30,037 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:30,037 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:30,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:30,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:33,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:33,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25030270] [2022-01-31 18:20:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [25030270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:33,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:33,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:20:33,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11675223] [2022-01-31 18:20:33,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:33,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:20:33,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:20:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:20:33,469 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:53,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:53,887 INFO L93 Difference]: Finished difference Result 647 states and 755 transitions. [2022-01-31 18:20:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:20:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-01-31 18:20:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:53,888 INFO L225 Difference]: With dead ends: 647 [2022-01-31 18:20:53,889 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 18:20:53,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5354 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:20:53,891 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 473 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 1585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1585 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:53,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 48 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1585 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:20:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 18:20:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 224. [2022-01-31 18:20:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2022-01-31 18:20:54,058 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 218 [2022-01-31 18:20:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:54,058 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2022-01-31 18:20:54,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2022-01-31 18:20:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 18:20:54,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:54,059 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:54,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:20:54,059 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash -178527546, now seen corresponding path program 103 times [2022-01-31 18:20:54,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:54,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298650152] [2022-01-31 18:20:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:54,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:54,061 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:54,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:54,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:57,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:57,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:57,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298650152] [2022-01-31 18:20:57,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1298650152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:57,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:57,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:20:57,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865042323] [2022-01-31 18:20:57,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:57,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:20:57,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:20:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:20:57,571 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 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) [2022-01-31 18:21:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:19,004 INFO L93 Difference]: Finished difference Result 653 states and 762 transitions. [2022-01-31 18:21:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:21:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 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 220 [2022-01-31 18:21:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:19,006 INFO L225 Difference]: With dead ends: 653 [2022-01-31 18:21:19,006 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 18:21:19,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5458 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:21:19,008 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 531 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 1760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1760 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:19,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 43 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1760 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:21:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 18:21:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 226. [2022-01-31 18:21:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2022-01-31 18:21:19,160 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 220 [2022-01-31 18:21:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:19,161 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2022-01-31 18:21:19,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 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) [2022-01-31 18:21:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2022-01-31 18:21:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 18:21:19,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:19,161 INFO L514 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:19,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:21:19,162 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash 142601159, now seen corresponding path program 104 times [2022-01-31 18:21:19,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:19,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210045928] [2022-01-31 18:21:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:19,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:19,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:19,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:19,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat