/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_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:58:00,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:58:00,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:58:00,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:58:00,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:58:00,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:58:00,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:58:00,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:58:00,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:58:00,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:58:00,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:58:00,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:58:00,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:58:00,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:58:00,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:58:00,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:58:00,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:58:00,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:58:00,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:58:00,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:58:00,280 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 17:58:00,290 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:58:00,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:58:00,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:58:00,291 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:58:00,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:58:00,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:58:00,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:58:00,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:58:00,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:58:00,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:58:00,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:58:00,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:58:00,292 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:58:00,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:58:00,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:58:00,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:58:00,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:58:00,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:58:00,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:58:00,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:58:00,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:58:00,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:58:00,293 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:58:00,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:58:00,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:58:00,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:58:00,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:58:00,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:58:00,457 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:58:00,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-2.i [2022-01-31 17:58:00,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c56d76a/0cf4412f2432438787ffd2b6d10f308e/FLAGf43b615aa [2022-01-31 17:58:00,847 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:58:00,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-2.i [2022-01-31 17:58:00,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c56d76a/0cf4412f2432438787ffd2b6d10f308e/FLAGf43b615aa [2022-01-31 17:58:01,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c56d76a/0cf4412f2432438787ffd2b6d10f308e [2022-01-31 17:58:01,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:58:01,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:58:01,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:58:01,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:58:01,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:58:01,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2426c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01, skipping insertion in model container [2022-01-31 17:58:01,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:58:01,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:58:01,471 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_running-2.i[811,824] [2022-01-31 17:58:01,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:58:01,483 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:58:01,497 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_running-2.i[811,824] [2022-01-31 17:58:01,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:58:01,551 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:58:01,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01 WrapperNode [2022-01-31 17:58:01,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:58:01,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:58:01,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:58:01,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:58:01,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:58:01,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:58:01,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:58:01,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:58:01,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (1/1) ... [2022-01-31 17:58:01,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:58:01,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:58:01,603 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 17:58:01,619 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 17:58:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:58:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:58:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:58:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:58:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:58:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:58:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:58:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:58:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:58:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:58:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:58:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:58:01,691 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:58:01,693 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:58:01,787 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:58:01,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:58:01,791 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 17:58:01,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:58:01 BoogieIcfgContainer [2022-01-31 17:58:01,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:58:01,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:58:01,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:58:01,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:58:01,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:58:01" (1/3) ... [2022-01-31 17:58:01,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d97368f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:58:01, skipping insertion in model container [2022-01-31 17:58:01,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:01" (2/3) ... [2022-01-31 17:58:01,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d97368f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:58:01, skipping insertion in model container [2022-01-31 17:58:01,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:58:01" (3/3) ... [2022-01-31 17:58:01,797 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2022-01-31 17:58:01,800 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:58:01,800 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:58:01,834 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:58:01,838 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 17:58:01,838 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:58:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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 17:58:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:58:01,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:01,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:01,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1480627234, now seen corresponding path program 1 times [2022-01-31 17:58:01,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:01,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632324643] [2022-01-31 17:58:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:01,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:01,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,030 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 17:58:02,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:02,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632324643] [2022-01-31 17:58:02,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1632324643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:02,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:02,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:58:02,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545016197] [2022-01-31 17:58:02,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:02,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:58:02,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:58:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:58:02,066 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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 17:58:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:02,118 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-01-31 17:58:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:58:02,120 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 17:58:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:02,124 INFO L225 Difference]: With dead ends: 56 [2022-01-31 17:58:02,124 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 17:58:02,128 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 17:58:02,134 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 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 17:58:02,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 17:58:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 17:58:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-31 17:58:02,169 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2022-01-31 17:58:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:02,170 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-31 17:58:02,170 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 17:58:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-31 17:58:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:58:02,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:02,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:02,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:58:02,172 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1732153775, now seen corresponding path program 1 times [2022-01-31 17:58:02,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:02,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031209946] [2022-01-31 17:58:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:02,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:02,183 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,242 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 17:58:02,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:02,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031209946] [2022-01-31 17:58:02,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031209946] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:02,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:02,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:58:02,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541314960] [2022-01-31 17:58:02,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:02,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:58:02,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:58:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:58:02,244 INFO L87 Difference]: Start difference. First operand 25 states and 32 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 17:58:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:02,325 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2022-01-31 17:58:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:58:02,326 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 17:58:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:02,327 INFO L225 Difference]: With dead ends: 54 [2022-01-31 17:58:02,327 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 17:58:02,331 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 17:58:02,332 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:02,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 17:58:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-31 17:58:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 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 17:58:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-31 17:58:02,343 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-01-31 17:58:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:02,343 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-31 17:58:02,343 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 17:58:02,343 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-31 17:58:02,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:58:02,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:02,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:02,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:58:02,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash -562644404, now seen corresponding path program 1 times [2022-01-31 17:58:02,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:02,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948293687] [2022-01-31 17:58:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:02,355 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:02,356 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:02,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:02,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,428 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 17:58:02,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948293687] [2022-01-31 17:58:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1948293687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:02,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:02,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:58:02,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882180008] [2022-01-31 17:58:02,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:02,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:58:02,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:58:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:58:02,430 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 17:58:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:02,532 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2022-01-31 17:58:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:58:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 27 [2022-01-31 17:58:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:02,533 INFO L225 Difference]: With dead ends: 68 [2022-01-31 17:58:02,533 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 17:58:02,533 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 17:58:02,534 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:02,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 33 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 17:58:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-01-31 17:58:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-01-31 17:58:02,554 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 27 [2022-01-31 17:58:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:02,554 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-01-31 17:58:02,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 17:58:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-01-31 17:58:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:58:02,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:02,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:02,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:58:02,559 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1666278253, now seen corresponding path program 2 times [2022-01-31 17:58:02,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:02,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750325266] [2022-01-31 17:58:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:02,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:02,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:02,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:02,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,624 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 17:58:02,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750325266] [2022-01-31 17:58:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [750325266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:02,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:02,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:58:02,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397791638] [2022-01-31 17:58:02,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:02,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:58:02,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:02,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:58:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:58:02,625 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 17:58:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:02,709 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2022-01-31 17:58:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:58:02,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 17:58:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:02,710 INFO L225 Difference]: With dead ends: 66 [2022-01-31 17:58:02,710 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:58:02,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:58:02,711 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:02,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 41 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:58:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-01-31 17:58:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-01-31 17:58:02,719 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 39 [2022-01-31 17:58:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:02,719 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-01-31 17:58:02,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 17:58:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-01-31 17:58:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:58:02,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:02,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:02,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:58:02,720 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:02,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:02,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1864798931, now seen corresponding path program 1 times [2022-01-31 17:58:02,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:02,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92245511] [2022-01-31 17:58:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:02,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:02,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:02,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:02,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,779 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 17:58:02,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:02,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92245511] [2022-01-31 17:58:02,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [92245511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:02,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:02,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:58:02,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48087762] [2022-01-31 17:58:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:02,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:58:02,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:58:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:58:02,781 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 17:58:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:02,904 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2022-01-31 17:58:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:58:02,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 39 [2022-01-31 17:58:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:02,905 INFO L225 Difference]: With dead ends: 75 [2022-01-31 17:58:02,905 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:58:02,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:58:02,906 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:02,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 37 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:58:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-01-31 17:58:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-01-31 17:58:02,928 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 39 [2022-01-31 17:58:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:02,928 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-01-31 17:58:02,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 17:58:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-01-31 17:58:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:58:02,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:02,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:02,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:58:02,929 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash 340958061, now seen corresponding path program 1 times [2022-01-31 17:58:02,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:02,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817332417] [2022-01-31 17:58:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:02,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:02,932 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:02,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:02,932 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:03,005 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 17:58:03,006 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:03,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817332417] [2022-01-31 17:58:03,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817332417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:03,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:03,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:58:03,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3723711] [2022-01-31 17:58:03,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:03,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:58:03,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:58:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:58:03,008 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 17:58:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:03,114 INFO L93 Difference]: Finished difference Result 114 states and 156 transitions. [2022-01-31 17:58:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:58:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 39 [2022-01-31 17:58:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:03,116 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:58:03,116 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 17:58:03,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:58:03,118 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 123 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:03,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 33 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 17:58:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2022-01-31 17:58:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2022-01-31 17:58:03,138 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 39 [2022-01-31 17:58:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:03,139 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2022-01-31 17:58:03,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 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 17:58:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2022-01-31 17:58:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:58:03,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:03,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:03,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:58:03,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1892223976, now seen corresponding path program 2 times [2022-01-31 17:58:03,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:03,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440999782] [2022-01-31 17:58:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:03,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:03,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:03,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:03,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:03,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:03,246 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 17:58:03,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:03,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440999782] [2022-01-31 17:58:03,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440999782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:03,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:03,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:58:03,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158286100] [2022-01-31 17:58:03,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:03,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:58:03,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:58:03,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:58:03,248 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 17:58:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:03,369 INFO L93 Difference]: Finished difference Result 144 states and 198 transitions. [2022-01-31 17:58:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:58:03,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 51 [2022-01-31 17:58:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:03,371 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:58:03,371 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:58:03,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:58:03,372 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 151 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:03,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 38 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:58:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2022-01-31 17:58:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2022-01-31 17:58:03,394 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 51 [2022-01-31 17:58:03,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:03,394 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2022-01-31 17:58:03,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 17:58:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2022-01-31 17:58:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:58:03,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:03,395 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:03,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:58:03,396 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1407530633, now seen corresponding path program 3 times [2022-01-31 17:58:03,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:03,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585535914] [2022-01-31 17:58:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:03,398 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:03,398 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:03,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:03,399 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:03,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:03,496 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 17:58:03,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:03,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585535914] [2022-01-31 17:58:03,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585535914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:03,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:03,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:58:03,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156151517] [2022-01-31 17:58:03,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:03,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:58:03,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:58:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:58:03,501 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 17:58:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:03,634 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2022-01-31 17:58:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:58:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 63 [2022-01-31 17:58:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:03,635 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:58:03,635 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 17:58:03,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:58:03,636 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 257 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:03,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 28 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 17:58:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2022-01-31 17:58:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 91 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2022-01-31 17:58:03,651 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 63 [2022-01-31 17:58:03,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:03,651 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2022-01-31 17:58:03,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 17:58:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2022-01-31 17:58:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:58:03,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:03,653 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:03,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:58:03,653 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash 770657092, now seen corresponding path program 4 times [2022-01-31 17:58:03,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:03,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848404354] [2022-01-31 17:58:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:03,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:03,655 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:03,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:03,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:03,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:03,746 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 17:58:03,746 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:03,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848404354] [2022-01-31 17:58:03,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848404354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:03,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:03,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:58:03,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659138625] [2022-01-31 17:58:03,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:03,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:58:03,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:03,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:58:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:58:03,748 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 17:58:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:03,910 INFO L93 Difference]: Finished difference Result 204 states and 282 transitions. [2022-01-31 17:58:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:58:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 75 [2022-01-31 17:58:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:03,911 INFO L225 Difference]: With dead ends: 204 [2022-01-31 17:58:03,911 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 17:58:03,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:58:03,914 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 259 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:03,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 33 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 17:58:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2022-01-31 17:58:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.3644859813084111) internal successors, (146), 107 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:03,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2022-01-31 17:58:03,931 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 75 [2022-01-31 17:58:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:03,931 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2022-01-31 17:58:03,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 17:58:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2022-01-31 17:58:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:58:03,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:03,932 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:03,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:58:03,932 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash 264519589, now seen corresponding path program 5 times [2022-01-31 17:58:03,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384176910] [2022-01-31 17:58:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:03,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:03,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:03,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:03,936 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:03,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,000 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 17:58:04,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:04,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384176910] [2022-01-31 17:58:04,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [384176910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:04,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:04,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:58:04,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644254978] [2022-01-31 17:58:04,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:04,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:58:04,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:04,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:58:04,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:58:04,001 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 17:58:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:04,185 INFO L93 Difference]: Finished difference Result 234 states and 324 transitions. [2022-01-31 17:58:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:58:04,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 87 [2022-01-31 17:58:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:04,186 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:58:04,186 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 17:58:04,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:58:04,187 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 300 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:04,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 38 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 17:58:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2022-01-31 17:58:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3658536585365855) internal successors, (168), 123 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 172 transitions. [2022-01-31 17:58:04,200 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 172 transitions. Word has length 87 [2022-01-31 17:58:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:04,200 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 172 transitions. [2022-01-31 17:58:04,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 17:58:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 172 transitions. [2022-01-31 17:58:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:58:04,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:04,201 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:04,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:58:04,201 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash 190269600, now seen corresponding path program 6 times [2022-01-31 17:58:04,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:04,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127400650] [2022-01-31 17:58:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:04,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:04,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:04,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:04,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,267 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 17:58:04,267 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:04,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127400650] [2022-01-31 17:58:04,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [127400650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:04,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:04,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:58:04,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214993967] [2022-01-31 17:58:04,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:04,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:58:04,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:58:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:58:04,269 INFO L87 Difference]: Start difference. First operand 128 states and 172 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 17:58:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:04,459 INFO L93 Difference]: Finished difference Result 264 states and 366 transitions. [2022-01-31 17:58:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:58:04,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 99 [2022-01-31 17:58:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:04,460 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:58:04,460 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 17:58:04,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:58:04,461 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 367 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:04,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 33 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 17:58:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2022-01-31 17:58:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.3669064748201438) internal successors, (190), 139 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 194 transitions. [2022-01-31 17:58:04,476 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 194 transitions. Word has length 99 [2022-01-31 17:58:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:04,476 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 194 transitions. [2022-01-31 17:58:04,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 17:58:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 194 transitions. [2022-01-31 17:58:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:58:04,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:04,477 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:04,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:58:04,477 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash 423278273, now seen corresponding path program 7 times [2022-01-31 17:58:04,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:04,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26242810] [2022-01-31 17:58:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:04,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:04,479 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:04,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:04,480 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,552 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 17:58:04,552 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:04,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26242810] [2022-01-31 17:58:04,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [26242810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:04,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:04,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:58:04,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501271792] [2022-01-31 17:58:04,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:04,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:58:04,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:58:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:58:04,553 INFO L87 Difference]: Start difference. First operand 144 states and 194 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 17:58:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:04,803 INFO L93 Difference]: Finished difference Result 294 states and 408 transitions. [2022-01-31 17:58:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:58:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 111 [2022-01-31 17:58:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:04,804 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:58:04,804 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 17:58:04,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:58:04,805 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 473 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:04,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 33 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 17:58:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2022-01-31 17:58:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.367741935483871) internal successors, (212), 155 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 216 transitions. [2022-01-31 17:58:04,823 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 216 transitions. Word has length 111 [2022-01-31 17:58:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:04,823 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 216 transitions. [2022-01-31 17:58:04,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 17:58:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 216 transitions. [2022-01-31 17:58:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:58:04,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:04,824 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:04,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:58:04,824 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash 987759612, now seen corresponding path program 8 times [2022-01-31 17:58:04,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:04,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022764954] [2022-01-31 17:58:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:04,826 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:04,826 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:04,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:04,827 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,910 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 17:58:04,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:04,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022764954] [2022-01-31 17:58:04,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022764954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:04,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:04,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:58:04,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646708573] [2022-01-31 17:58:04,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:04,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:58:04,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:58:04,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:58:04,911 INFO L87 Difference]: Start difference. First operand 160 states and 216 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 17:58:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:05,163 INFO L93 Difference]: Finished difference Result 324 states and 450 transitions. [2022-01-31 17:58:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:58:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 123 [2022-01-31 17:58:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:05,164 INFO L225 Difference]: With dead ends: 324 [2022-01-31 17:58:05,164 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 17:58:05,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:58:05,165 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 436 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:05,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 38 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:58:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 17:58:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2022-01-31 17:58:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.368421052631579) internal successors, (234), 171 states have internal predecessors, (234), 3 states have call successors, (3), 3 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 17:58:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 238 transitions. [2022-01-31 17:58:05,183 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 238 transitions. Word has length 123 [2022-01-31 17:58:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:05,200 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 238 transitions. [2022-01-31 17:58:05,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 17:58:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 238 transitions. [2022-01-31 17:58:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:58:05,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:05,202 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:05,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:58:05,202 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash -90989603, now seen corresponding path program 9 times [2022-01-31 17:58:05,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:05,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284405281] [2022-01-31 17:58:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:05,204 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:05,204 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:05,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:05,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:05,314 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 17:58:05,314 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284405281] [2022-01-31 17:58:05,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284405281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:05,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:05,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:58:05,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904028560] [2022-01-31 17:58:05,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:05,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:58:05,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:58:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:58:05,316 INFO L87 Difference]: Start difference. First operand 176 states and 238 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 17:58:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:05,585 INFO L93 Difference]: Finished difference Result 354 states and 492 transitions. [2022-01-31 17:58:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:58:05,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 135 [2022-01-31 17:58:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:05,587 INFO L225 Difference]: With dead ends: 354 [2022-01-31 17:58:05,587 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 17:58:05,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:58:05,589 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 568 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:05,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 33 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:58:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 17:58:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2022-01-31 17:58:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.3689839572192513) internal successors, (256), 187 states have internal predecessors, (256), 3 states have call successors, (3), 3 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 17:58:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 260 transitions. [2022-01-31 17:58:05,615 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 260 transitions. Word has length 135 [2022-01-31 17:58:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:05,616 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 260 transitions. [2022-01-31 17:58:05,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 17:58:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 260 transitions. [2022-01-31 17:58:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:58:05,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:05,616 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:05,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:58:05,617 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:05,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1147698520, now seen corresponding path program 10 times [2022-01-31 17:58:05,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:05,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054892479] [2022-01-31 17:58:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:05,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:05,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:05,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:05,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:05,751 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 17:58:05,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054892479] [2022-01-31 17:58:05,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2054892479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:05,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:05,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:58:05,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257085846] [2022-01-31 17:58:05,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:05,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:58:05,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:58:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:58:05,752 INFO L87 Difference]: Start difference. First operand 192 states and 260 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:06,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:06,080 INFO L93 Difference]: Finished difference Result 384 states and 534 transitions. [2022-01-31 17:58:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:58:06,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:58:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:06,081 INFO L225 Difference]: With dead ends: 384 [2022-01-31 17:58:06,081 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 17:58:06,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:58:06,083 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 596 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:06,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 38 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:58:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 17:58:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2022-01-31 17:58:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.3694581280788178) internal successors, (278), 203 states have internal predecessors, (278), 3 states have call successors, (3), 3 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 17:58:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-01-31 17:58:06,120 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 147 [2022-01-31 17:58:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:06,121 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-01-31 17:58:06,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-01-31 17:58:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:58:06,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:06,122 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:06,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:58:06,122 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1759908103, now seen corresponding path program 11 times [2022-01-31 17:58:06,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:06,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178731111] [2022-01-31 17:58:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:06,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:06,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:06,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:06,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:06,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:06,254 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 17:58:06,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:06,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178731111] [2022-01-31 17:58:06,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [178731111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:06,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:06,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:58:06,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474117465] [2022-01-31 17:58:06,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:06,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:58:06,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:58:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:58:06,255 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 17:58:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:06,591 INFO L93 Difference]: Finished difference Result 414 states and 576 transitions. [2022-01-31 17:58:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:58:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 159 [2022-01-31 17:58:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:06,592 INFO L225 Difference]: With dead ends: 414 [2022-01-31 17:58:06,592 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 17:58:06,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:58:06,593 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 533 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:06,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 48 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:58:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 17:58:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-01-31 17:58:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.36986301369863) internal successors, (300), 219 states have internal predecessors, (300), 3 states have call successors, (3), 3 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 17:58:06,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 304 transitions. [2022-01-31 17:58:06,636 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 304 transitions. Word has length 159 [2022-01-31 17:58:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:06,636 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 304 transitions. [2022-01-31 17:58:06,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 17:58:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 304 transitions. [2022-01-31 17:58:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:58:06,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:06,637 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:06,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:58:06,638 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash -439372620, now seen corresponding path program 12 times [2022-01-31 17:58:06,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:06,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924432182] [2022-01-31 17:58:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:06,640 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:06,640 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:06,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:06,642 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:06,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:06,785 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 17:58:06,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924432182] [2022-01-31 17:58:06,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924432182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:06,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:06,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:58:06,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132525320] [2022-01-31 17:58:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:06,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:58:06,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:06,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:58:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:58:06,787 INFO L87 Difference]: Start difference. First operand 224 states and 304 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 17:58:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:07,118 INFO L93 Difference]: Finished difference Result 444 states and 618 transitions. [2022-01-31 17:58:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:58:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 171 [2022-01-31 17:58:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:07,119 INFO L225 Difference]: With dead ends: 444 [2022-01-31 17:58:07,119 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 17:58:07,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:58:07,120 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 587 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:07,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 43 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:58:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 17:58:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 240. [2022-01-31 17:58:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.3702127659574468) internal successors, (322), 235 states have internal predecessors, (322), 3 states have call successors, (3), 3 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 17:58:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2022-01-31 17:58:07,177 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 171 [2022-01-31 17:58:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:07,177 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2022-01-31 17:58:07,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 17:58:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2022-01-31 17:58:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:58:07,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:07,178 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:07,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:58:07,179 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash -887574507, now seen corresponding path program 13 times [2022-01-31 17:58:07,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:07,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448138502] [2022-01-31 17:58:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:07,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:07,180 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:07,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:07,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:07,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:07,326 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 17:58:07,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448138502] [2022-01-31 17:58:07,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [448138502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:07,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:07,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:58:07,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475815948] [2022-01-31 17:58:07,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:07,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:58:07,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:58:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:58:07,327 INFO L87 Difference]: Start difference. First operand 240 states and 326 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 17:58:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:07,740 INFO L93 Difference]: Finished difference Result 474 states and 660 transitions. [2022-01-31 17:58:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:58:07,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 183 [2022-01-31 17:58:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:07,741 INFO L225 Difference]: With dead ends: 474 [2022-01-31 17:58:07,742 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 17:58:07,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:58:07,743 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 732 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:07,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 38 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:58:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 17:58:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 256. [2022-01-31 17:58:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.3705179282868525) internal successors, (344), 251 states have internal predecessors, (344), 3 states have call successors, (3), 3 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 17:58:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 348 transitions. [2022-01-31 17:58:07,772 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 348 transitions. Word has length 183 [2022-01-31 17:58:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:07,773 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 348 transitions. [2022-01-31 17:58:07,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 17:58:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 348 transitions. [2022-01-31 17:58:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:58:07,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:07,774 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:07,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:58:07,774 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:07,774 INFO L85 PathProgramCache]: Analyzing trace with hash -218846704, now seen corresponding path program 14 times [2022-01-31 17:58:07,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918783672] [2022-01-31 17:58:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:07,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:07,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:07,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:07,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:07,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:07,958 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 17:58:07,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:07,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918783672] [2022-01-31 17:58:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [918783672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:07,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:07,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:58:07,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967143827] [2022-01-31 17:58:07,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:07,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:58:07,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:58:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:58:07,960 INFO L87 Difference]: Start difference. First operand 256 states and 348 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 17:58:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:08,415 INFO L93 Difference]: Finished difference Result 504 states and 702 transitions. [2022-01-31 17:58:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:58:08,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 195 [2022-01-31 17:58:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:08,416 INFO L225 Difference]: With dead ends: 504 [2022-01-31 17:58:08,416 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 17:58:08,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:58:08,418 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 773 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:08,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 43 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:58:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 17:58:08,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 272. [2022-01-31 17:58:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.3707865168539326) internal successors, (366), 267 states have internal predecessors, (366), 3 states have call successors, (3), 3 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 17:58:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 370 transitions. [2022-01-31 17:58:08,451 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 370 transitions. Word has length 195 [2022-01-31 17:58:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:08,451 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 370 transitions. [2022-01-31 17:58:08,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 17:58:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 370 transitions. [2022-01-31 17:58:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:58:08,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:08,452 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:08,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:58:08,452 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash 198893361, now seen corresponding path program 15 times [2022-01-31 17:58:08,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:08,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943620442] [2022-01-31 17:58:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:08,454 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:08,454 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:08,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:08,455 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:08,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:08,636 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 17:58:08,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943620442] [2022-01-31 17:58:08,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [943620442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:08,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:08,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:58:08,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397014266] [2022-01-31 17:58:08,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:08,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:58:08,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:58:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:58:08,638 INFO L87 Difference]: Start difference. First operand 272 states and 370 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 17:58:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:09,123 INFO L93 Difference]: Finished difference Result 534 states and 744 transitions. [2022-01-31 17:58:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:58:09,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 207 [2022-01-31 17:58:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:09,124 INFO L225 Difference]: With dead ends: 534 [2022-01-31 17:58:09,124 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 17:58:09,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:58:09,126 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 762 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:09,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 48 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 17:58:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2022-01-31 17:58:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.3710247349823321) internal successors, (388), 283 states have internal predecessors, (388), 3 states have call successors, (3), 3 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 17:58:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 392 transitions. [2022-01-31 17:58:09,169 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 392 transitions. Word has length 207 [2022-01-31 17:58:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:09,170 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 392 transitions. [2022-01-31 17:58:09,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 17:58:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 392 transitions. [2022-01-31 17:58:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:58:09,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:09,171 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:09,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:58:09,171 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:09,171 INFO L85 PathProgramCache]: Analyzing trace with hash 901143916, now seen corresponding path program 16 times [2022-01-31 17:58:09,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:09,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829070168] [2022-01-31 17:58:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:09,173 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:09,174 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:09,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:09,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:09,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:09,362 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 17:58:09,362 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829070168] [2022-01-31 17:58:09,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829070168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:09,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:09,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:58:09,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593113446] [2022-01-31 17:58:09,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:09,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:58:09,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:58:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:58:09,365 INFO L87 Difference]: Start difference. First operand 288 states and 392 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 17:58:09,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:09,901 INFO L93 Difference]: Finished difference Result 564 states and 786 transitions. [2022-01-31 17:58:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:58:09,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 219 [2022-01-31 17:58:09,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:09,903 INFO L225 Difference]: With dead ends: 564 [2022-01-31 17:58:09,903 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 17:58:09,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:58:09,904 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 881 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:09,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 43 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 17:58:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 304. [2022-01-31 17:58:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.37123745819398) internal successors, (410), 299 states have internal predecessors, (410), 3 states have call successors, (3), 3 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 17:58:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 414 transitions. [2022-01-31 17:58:09,944 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 414 transitions. Word has length 219 [2022-01-31 17:58:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:09,945 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 414 transitions. [2022-01-31 17:58:09,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 17:58:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 414 transitions. [2022-01-31 17:58:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:58:09,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:09,946 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:09,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:58:09,947 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash 128678989, now seen corresponding path program 17 times [2022-01-31 17:58:09,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:09,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441888763] [2022-01-31 17:58:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:09,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:09,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:09,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:09,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:10,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:10,164 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 17:58:10,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441888763] [2022-01-31 17:58:10,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441888763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:10,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:10,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:58:10,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112260817] [2022-01-31 17:58:10,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:10,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:58:10,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:58:10,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:58:10,166 INFO L87 Difference]: Start difference. First operand 304 states and 414 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 17:58:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:10,736 INFO L93 Difference]: Finished difference Result 594 states and 828 transitions. [2022-01-31 17:58:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:58:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 231 [2022-01-31 17:58:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:10,738 INFO L225 Difference]: With dead ends: 594 [2022-01-31 17:58:10,738 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 17:58:10,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:58:10,739 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 844 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:10,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 48 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 17:58:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 320. [2022-01-31 17:58:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.3714285714285714) internal successors, (432), 315 states have internal predecessors, (432), 3 states have call successors, (3), 3 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 17:58:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 436 transitions. [2022-01-31 17:58:10,781 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 436 transitions. Word has length 231 [2022-01-31 17:58:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:10,781 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 436 transitions. [2022-01-31 17:58:10,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 17:58:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 436 transitions. [2022-01-31 17:58:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:58:10,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:10,782 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:10,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:58:10,783 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1307823816, now seen corresponding path program 18 times [2022-01-31 17:58:10,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:10,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279077489] [2022-01-31 17:58:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:10,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:10,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:10,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:10,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,016 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 17:58:11,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279077489] [2022-01-31 17:58:11,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279077489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:58:11,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912163451] [2022-01-31 17:58:11,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:58:11,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:58:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:58:11,017 INFO L87 Difference]: Start difference. First operand 320 states and 436 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 17:58:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,628 INFO L93 Difference]: Finished difference Result 624 states and 870 transitions. [2022-01-31 17:58:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:58:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 243 [2022-01-31 17:58:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,630 INFO L225 Difference]: With dead ends: 624 [2022-01-31 17:58:11,630 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 17:58:11,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:58:11,631 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1210 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 38 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 17:58:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 336. [2022-01-31 17:58:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.3716012084592144) internal successors, (454), 331 states have internal predecessors, (454), 3 states have call successors, (3), 3 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 17:58:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 458 transitions. [2022-01-31 17:58:11,698 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 458 transitions. Word has length 243 [2022-01-31 17:58:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:11,698 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 458 transitions. [2022-01-31 17:58:11,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 17:58:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 458 transitions. [2022-01-31 17:58:11,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:58:11,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:11,700 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:11,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:58:11,700 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:11,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1171621737, now seen corresponding path program 19 times [2022-01-31 17:58:11,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:11,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994026027] [2022-01-31 17:58:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:11,703 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:11,703 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:11,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:11,704 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:11,991 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 17:58:11,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:11,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994026027] [2022-01-31 17:58:11,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994026027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:11,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:11,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:58:11,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758441501] [2022-01-31 17:58:11,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:11,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:58:11,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:58:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:58:11,993 INFO L87 Difference]: Start difference. First operand 336 states and 458 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 17:58:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:12,639 INFO L93 Difference]: Finished difference Result 654 states and 912 transitions. [2022-01-31 17:58:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:58:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 255 [2022-01-31 17:58:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:12,640 INFO L225 Difference]: With dead ends: 654 [2022-01-31 17:58:12,640 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 17:58:12,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:58:12,642 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1277 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:12,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 33 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 17:58:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 352. [2022-01-31 17:58:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.3717579250720462) internal successors, (476), 347 states have internal predecessors, (476), 3 states have call successors, (3), 3 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 17:58:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 480 transitions. [2022-01-31 17:58:12,704 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 480 transitions. Word has length 255 [2022-01-31 17:58:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:12,704 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 480 transitions. [2022-01-31 17:58:12,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 17:58:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 480 transitions. [2022-01-31 17:58:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:58:12,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:12,705 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:12,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:58:12,705 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1853096412, now seen corresponding path program 20 times [2022-01-31 17:58:12,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130195132] [2022-01-31 17:58:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:12,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:12,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:12,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:12,708 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:12,944 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 17:58:12,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130195132] [2022-01-31 17:58:12,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130195132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:12,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:12,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:58:12,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123041762] [2022-01-31 17:58:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:12,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:58:12,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:58:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:58:12,945 INFO L87 Difference]: Start difference. First operand 352 states and 480 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 17:58:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:13,615 INFO L93 Difference]: Finished difference Result 684 states and 954 transitions. [2022-01-31 17:58:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:58:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 267 [2022-01-31 17:58:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:13,617 INFO L225 Difference]: With dead ends: 684 [2022-01-31 17:58:13,617 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 17:58:13,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:58:13,618 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1188 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:13,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 43 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 17:58:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 368. [2022-01-31 17:58:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.371900826446281) internal successors, (498), 363 states have internal predecessors, (498), 3 states have call successors, (3), 3 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 17:58:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 502 transitions. [2022-01-31 17:58:13,673 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 502 transitions. Word has length 267 [2022-01-31 17:58:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:13,673 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 502 transitions. [2022-01-31 17:58:13,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 17:58:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 502 transitions. [2022-01-31 17:58:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:58:13,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:13,674 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:13,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:58:13,674 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash -962330491, now seen corresponding path program 21 times [2022-01-31 17:58:13,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433008312] [2022-01-31 17:58:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:13,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:13,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:13,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:13,677 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,953 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 17:58:13,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:13,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433008312] [2022-01-31 17:58:13,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1433008312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:13,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:13,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:58:13,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867245110] [2022-01-31 17:58:13,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:13,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:58:13,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:58:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:58:13,955 INFO L87 Difference]: Start difference. First operand 368 states and 502 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 17:58:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:14,676 INFO L93 Difference]: Finished difference Result 714 states and 996 transitions. [2022-01-31 17:58:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:58:14,677 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 279 [2022-01-31 17:58:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:14,678 INFO L225 Difference]: With dead ends: 714 [2022-01-31 17:58:14,678 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 17:58:14,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:58:14,681 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 969 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:14,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 58 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 17:58:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 384. [2022-01-31 17:58:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 379 states have (on average 1.3720316622691293) internal successors, (520), 379 states have internal predecessors, (520), 3 states have call successors, (3), 3 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 17:58:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 524 transitions. [2022-01-31 17:58:14,741 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 524 transitions. Word has length 279 [2022-01-31 17:58:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:14,741 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 524 transitions. [2022-01-31 17:58:14,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 17:58:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 524 transitions. [2022-01-31 17:58:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:58:14,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:14,743 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:14,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:58:14,743 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash -329389184, now seen corresponding path program 22 times [2022-01-31 17:58:14,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:14,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946209295] [2022-01-31 17:58:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:14,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:14,745 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:14,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:14,746 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:15,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:15,023 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 17:58:15,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:15,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946209295] [2022-01-31 17:58:15,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [946209295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:15,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:15,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:58:15,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723634247] [2022-01-31 17:58:15,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:15,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:58:15,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:15,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:58:15,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:58:15,025 INFO L87 Difference]: Start difference. First operand 384 states and 524 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 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 17:58:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:15,757 INFO L93 Difference]: Finished difference Result 744 states and 1038 transitions. [2022-01-31 17:58:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:58:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 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 291 [2022-01-31 17:58:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:15,759 INFO L225 Difference]: With dead ends: 744 [2022-01-31 17:58:15,759 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 17:58:15,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:58:15,760 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1179 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:15,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 43 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 17:58:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 400. [2022-01-31 17:58:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.3721518987341772) internal successors, (542), 395 states have internal predecessors, (542), 3 states have call successors, (3), 3 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 17:58:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 546 transitions. [2022-01-31 17:58:15,820 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 546 transitions. Word has length 291 [2022-01-31 17:58:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:15,820 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 546 transitions. [2022-01-31 17:58:15,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 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 17:58:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 546 transitions. [2022-01-31 17:58:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:58:15,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:15,821 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:15,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:58:15,821 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:15,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1553864799, now seen corresponding path program 23 times [2022-01-31 17:58:15,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:15,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62173151] [2022-01-31 17:58:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:15,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:15,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:15,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:15,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:16,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:16,215 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 17:58:16,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62173151] [2022-01-31 17:58:16,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [62173151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:16,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:16,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:58:16,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24573540] [2022-01-31 17:58:16,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:16,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:58:16,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:58:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:58:16,217 INFO L87 Difference]: Start difference. First operand 400 states and 546 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 17:58:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:16,918 INFO L93 Difference]: Finished difference Result 774 states and 1080 transitions. [2022-01-31 17:58:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:58:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 303 [2022-01-31 17:58:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:16,919 INFO L225 Difference]: With dead ends: 774 [2022-01-31 17:58:16,932 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 17:58:16,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:58:16,935 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1168 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:16,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1168 Valid, 53 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 17:58:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 416. [2022-01-31 17:58:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.3722627737226278) internal successors, (564), 411 states have internal predecessors, (564), 3 states have call successors, (3), 3 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 17:58:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 568 transitions. [2022-01-31 17:58:17,028 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 568 transitions. Word has length 303 [2022-01-31 17:58:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:17,028 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 568 transitions. [2022-01-31 17:58:17,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 17:58:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 568 transitions. [2022-01-31 17:58:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:58:17,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:17,029 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:17,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:58:17,029 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1068984612, now seen corresponding path program 24 times [2022-01-31 17:58:17,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:17,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320650873] [2022-01-31 17:58:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:17,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:17,031 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:17,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:17,033 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:17,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:17,334 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 17:58:17,334 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:17,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320650873] [2022-01-31 17:58:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [320650873] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:17,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:17,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:58:17,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748495059] [2022-01-31 17:58:17,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:17,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:58:17,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:58:17,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:58:17,335 INFO L87 Difference]: Start difference. First operand 416 states and 568 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 17:58:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:18,047 INFO L93 Difference]: Finished difference Result 804 states and 1122 transitions. [2022-01-31 17:58:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:58:18,047 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 315 [2022-01-31 17:58:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:18,051 INFO L225 Difference]: With dead ends: 804 [2022-01-31 17:58:18,051 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 17:58:18,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:58:18,053 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1261 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:18,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 48 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 17:58:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 432. [2022-01-31 17:58:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 427 states have (on average 1.3723653395784543) internal successors, (586), 427 states have internal predecessors, (586), 3 states have call successors, (3), 3 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 17:58:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 590 transitions. [2022-01-31 17:58:18,165 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 590 transitions. Word has length 315 [2022-01-31 17:58:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:18,165 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 590 transitions. [2022-01-31 17:58:18,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 17:58:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 590 transitions. [2022-01-31 17:58:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:58:18,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:18,172 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:18,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:58:18,172 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1369817923, now seen corresponding path program 25 times [2022-01-31 17:58:18,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:18,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310238377] [2022-01-31 17:58:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:18,174 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:18,174 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:18,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:18,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:18,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:18,572 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 17:58:18,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310238377] [2022-01-31 17:58:18,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310238377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:18,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:18,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:58:18,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443589841] [2022-01-31 17:58:18,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:18,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:58:18,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:58:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:58:18,573 INFO L87 Difference]: Start difference. First operand 432 states and 590 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 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 17:58:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:19,329 INFO L93 Difference]: Finished difference Result 834 states and 1164 transitions. [2022-01-31 17:58:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:58:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 17:58:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:19,331 INFO L225 Difference]: With dead ends: 834 [2022-01-31 17:58:19,331 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 17:58:19,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:58:19,332 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1458 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:19,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 43 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 17:58:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 448. [2022-01-31 17:58:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.3724604966139955) internal successors, (608), 443 states have internal predecessors, (608), 3 states have call successors, (3), 3 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 17:58:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 612 transitions. [2022-01-31 17:58:19,405 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 612 transitions. Word has length 327 [2022-01-31 17:58:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:19,405 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 612 transitions. [2022-01-31 17:58:19,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 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 17:58:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 612 transitions. [2022-01-31 17:58:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:58:19,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:19,406 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:19,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:58:19,406 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash -987037640, now seen corresponding path program 26 times [2022-01-31 17:58:19,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:19,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393685332] [2022-01-31 17:58:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:19,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:19,408 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:19,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:19,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:19,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:19,769 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 17:58:19,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393685332] [2022-01-31 17:58:19,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [393685332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:19,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:19,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:58:19,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305700256] [2022-01-31 17:58:19,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:19,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:58:19,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:19,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:58:19,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:58:19,771 INFO L87 Difference]: Start difference. First operand 448 states and 612 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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 17:58:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:20,620 INFO L93 Difference]: Finished difference Result 864 states and 1206 transitions. [2022-01-31 17:58:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:58:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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 339 [2022-01-31 17:58:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:20,628 INFO L225 Difference]: With dead ends: 864 [2022-01-31 17:58:20,628 INFO L226 Difference]: Without dead ends: 477 [2022-01-31 17:58:20,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:58:20,630 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1707 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:20,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1707 Valid, 38 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-31 17:58:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 464. [2022-01-31 17:58:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 459 states have (on average 1.3725490196078431) internal successors, (630), 459 states have internal predecessors, (630), 3 states have call successors, (3), 3 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 17:58:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 634 transitions. [2022-01-31 17:58:20,707 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 634 transitions. Word has length 339 [2022-01-31 17:58:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:20,708 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 634 transitions. [2022-01-31 17:58:20,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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 17:58:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 634 transitions. [2022-01-31 17:58:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:58:20,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:20,709 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:20,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:58:20,710 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash 316145625, now seen corresponding path program 27 times [2022-01-31 17:58:20,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:20,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578656371] [2022-01-31 17:58:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:20,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:20,712 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:20,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:20,714 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:21,154 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 17:58:21,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578656371] [2022-01-31 17:58:21,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578656371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:21,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:21,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:58:21,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754650122] [2022-01-31 17:58:21,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:21,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:58:21,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:58:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:58:21,155 INFO L87 Difference]: Start difference. First operand 464 states and 634 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 17:58:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:22,005 INFO L93 Difference]: Finished difference Result 894 states and 1248 transitions. [2022-01-31 17:58:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:58:22,005 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 351 [2022-01-31 17:58:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:22,007 INFO L225 Difference]: With dead ends: 894 [2022-01-31 17:58:22,007 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 17:58:22,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:58:22,009 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1397 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1397 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:22,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1397 Valid, 53 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 17:58:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 480. [2022-01-31 17:58:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.3726315789473684) internal successors, (652), 475 states have internal predecessors, (652), 3 states have call successors, (3), 3 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 17:58:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 656 transitions. [2022-01-31 17:58:22,101 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 656 transitions. Word has length 351 [2022-01-31 17:58:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:22,101 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 656 transitions. [2022-01-31 17:58:22,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 17:58:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 656 transitions. [2022-01-31 17:58:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:58:22,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:22,102 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:58:22,103 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash -387700844, now seen corresponding path program 28 times [2022-01-31 17:58:22,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:22,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195332373] [2022-01-31 17:58:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:22,104 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:22,105 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:22,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:22,106 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:22,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:22,514 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 17:58:22,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:22,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195332373] [2022-01-31 17:58:22,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [195332373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:22,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:22,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:58:22,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89101954] [2022-01-31 17:58:22,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:22,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:58:22,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:58:22,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:58:22,515 INFO L87 Difference]: Start difference. First operand 480 states and 656 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 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 17:58:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:23,534 INFO L93 Difference]: Finished difference Result 924 states and 1290 transitions. [2022-01-31 17:58:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:58:23,535 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 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 363 [2022-01-31 17:58:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:23,536 INFO L225 Difference]: With dead ends: 924 [2022-01-31 17:58:23,536 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 17:58:23,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:58:23,538 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1724 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:23,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1724 Valid, 38 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 17:58:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 496. [2022-01-31 17:58:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 491 states have (on average 1.3727087576374746) internal successors, (674), 491 states have internal predecessors, (674), 3 states have call successors, (3), 3 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 17:58:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 678 transitions. [2022-01-31 17:58:23,625 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 678 transitions. Word has length 363 [2022-01-31 17:58:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:23,625 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 678 transitions. [2022-01-31 17:58:23,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 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 17:58:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 678 transitions. [2022-01-31 17:58:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:58:23,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:23,627 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:23,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:58:23,627 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash -182046475, now seen corresponding path program 29 times [2022-01-31 17:58:23,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:23,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279814252] [2022-01-31 17:58:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:23,629 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:23,629 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:23,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:23,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,055 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 17:58:24,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:24,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279814252] [2022-01-31 17:58:24,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [279814252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:24,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:24,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:58:24,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379711012] [2022-01-31 17:58:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:24,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:58:24,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:58:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:58:24,056 INFO L87 Difference]: Start difference. First operand 496 states and 678 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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 17:58:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:24,869 INFO L93 Difference]: Finished difference Result 954 states and 1332 transitions. [2022-01-31 17:58:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:58:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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 375 [2022-01-31 17:58:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:24,871 INFO L225 Difference]: With dead ends: 954 [2022-01-31 17:58:24,871 INFO L226 Difference]: Without dead ends: 525 [2022-01-31 17:58:24,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:58:24,872 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1583 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:24,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 43 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:24,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-31 17:58:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 512. [2022-01-31 17:58:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 507 states have (on average 1.3727810650887573) internal successors, (696), 507 states have internal predecessors, (696), 3 states have call successors, (3), 3 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 17:58:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 700 transitions. [2022-01-31 17:58:24,964 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 700 transitions. Word has length 375 [2022-01-31 17:58:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:24,964 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 700 transitions. [2022-01-31 17:58:24,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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 17:58:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 700 transitions. [2022-01-31 17:58:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 17:58:24,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:24,973 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:24,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:58:24,973 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:24,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:24,973 INFO L85 PathProgramCache]: Analyzing trace with hash 793971952, now seen corresponding path program 30 times [2022-01-31 17:58:24,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:24,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786549946] [2022-01-31 17:58:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:24,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:24,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:24,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:24,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:25,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:25,443 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 17:58:25,443 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:25,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786549946] [2022-01-31 17:58:25,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786549946] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:25,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:25,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:58:25,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29179548] [2022-01-31 17:58:25,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:25,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:58:25,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:25,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:58:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:58:25,445 INFO L87 Difference]: Start difference. First operand 512 states and 700 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 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 17:58:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:26,371 INFO L93 Difference]: Finished difference Result 984 states and 1374 transitions. [2022-01-31 17:58:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:58:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 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 387 [2022-01-31 17:58:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:26,373 INFO L225 Difference]: With dead ends: 984 [2022-01-31 17:58:26,373 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 17:58:26,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:58:26,374 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1910 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:26,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 53 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:58:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 17:58:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 528. [2022-01-31 17:58:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 523 states have (on average 1.372848948374761) internal successors, (718), 523 states have internal predecessors, (718), 3 states have call successors, (3), 3 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 17:58:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 722 transitions. [2022-01-31 17:58:26,472 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 722 transitions. Word has length 387 [2022-01-31 17:58:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:26,473 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 722 transitions. [2022-01-31 17:58:26,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 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 17:58:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 722 transitions. [2022-01-31 17:58:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-31 17:58:26,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:26,474 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:26,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:58:26,474 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash 311414801, now seen corresponding path program 31 times [2022-01-31 17:58:26,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:26,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262183764] [2022-01-31 17:58:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:26,476 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:26,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:26,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:26,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:26,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:26,948 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 17:58:26,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:26,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262183764] [2022-01-31 17:58:26,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262183764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:26,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:26,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:58:26,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210134358] [2022-01-31 17:58:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:26,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:58:26,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:26,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:58:26,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:58:26,950 INFO L87 Difference]: Start difference. First operand 528 states and 722 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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 17:58:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:27,894 INFO L93 Difference]: Finished difference Result 1014 states and 1416 transitions. [2022-01-31 17:58:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:58:27,895 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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 399 [2022-01-31 17:58:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:27,897 INFO L225 Difference]: With dead ends: 1014 [2022-01-31 17:58:27,897 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 17:58:27,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:58:27,898 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1990 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1990 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:27,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1990 Valid, 53 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 17:58:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 544. [2022-01-31 17:58:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 539 states have (on average 1.37291280148423) internal successors, (740), 539 states have internal predecessors, (740), 3 states have call successors, (3), 3 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 17:58:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 744 transitions. [2022-01-31 17:58:28,018 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 744 transitions. Word has length 399 [2022-01-31 17:58:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:28,018 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 744 transitions. [2022-01-31 17:58:28,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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 17:58:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 744 transitions. [2022-01-31 17:58:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:58:28,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:28,020 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:28,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:58:28,020 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1839812532, now seen corresponding path program 32 times [2022-01-31 17:58:28,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:28,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927032743] [2022-01-31 17:58:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:28,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:28,023 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:28,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:28,025 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:28,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:28,477 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 17:58:28,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:28,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927032743] [2022-01-31 17:58:28,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [927032743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:28,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:28,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:58:28,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476138969] [2022-01-31 17:58:28,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:28,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:58:28,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:28,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:58:28,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:58:28,480 INFO L87 Difference]: Start difference. First operand 544 states and 744 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 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 17:58:29,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:29,727 INFO L93 Difference]: Finished difference Result 1044 states and 1458 transitions. [2022-01-31 17:58:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:58:29,727 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 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 411 [2022-01-31 17:58:29,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:29,728 INFO L225 Difference]: With dead ends: 1044 [2022-01-31 17:58:29,728 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 17:58:29,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:58:29,730 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1706 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:29,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 43 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:58:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 17:58:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 560. [2022-01-31 17:58:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.372972972972973) internal successors, (762), 555 states have internal predecessors, (762), 3 states have call successors, (3), 3 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 17:58:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 766 transitions. [2022-01-31 17:58:29,837 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 766 transitions. Word has length 411 [2022-01-31 17:58:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:29,838 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 766 transitions. [2022-01-31 17:58:29,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 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 17:58:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 766 transitions. [2022-01-31 17:58:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-01-31 17:58:29,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:29,839 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:29,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:58:29,840 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1633672493, now seen corresponding path program 33 times [2022-01-31 17:58:29,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:29,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601334279] [2022-01-31 17:58:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:29,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:29,842 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:29,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:29,844 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:30,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:30,349 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 17:58:30,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:30,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601334279] [2022-01-31 17:58:30,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601334279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:30,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:30,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:58:30,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781109930] [2022-01-31 17:58:30,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:30,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:58:30,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:58:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:58:30,351 INFO L87 Difference]: Start difference. First operand 560 states and 766 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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 17:58:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:31,467 INFO L93 Difference]: Finished difference Result 1074 states and 1500 transitions. [2022-01-31 17:58:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:58:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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 423 [2022-01-31 17:58:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:31,469 INFO L225 Difference]: With dead ends: 1074 [2022-01-31 17:58:31,469 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 17:58:31,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:58:31,470 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2176 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2176 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:31,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2176 Valid, 38 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:58:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 17:58:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 576. [2022-01-31 17:58:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 571 states have (on average 1.3730297723292468) internal successors, (784), 571 states have internal predecessors, (784), 3 states have call successors, (3), 3 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 17:58:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 788 transitions. [2022-01-31 17:58:31,594 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 788 transitions. Word has length 423 [2022-01-31 17:58:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:31,595 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 788 transitions. [2022-01-31 17:58:31,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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 17:58:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 788 transitions. [2022-01-31 17:58:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 17:58:31,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:31,596 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:31,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:58:31,597 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash -506588760, now seen corresponding path program 34 times [2022-01-31 17:58:31,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:31,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036724207] [2022-01-31 17:58:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:31,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:31,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:31,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:31,601 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:32,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:32,162 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 17:58:32,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:32,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036724207] [2022-01-31 17:58:32,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036724207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:32,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:32,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:58:32,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701611976] [2022-01-31 17:58:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:32,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:58:32,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:58:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:58:32,163 INFO L87 Difference]: Start difference. First operand 576 states and 788 transitions. Second operand has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 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 17:58:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:33,445 INFO L93 Difference]: Finished difference Result 1104 states and 1542 transitions. [2022-01-31 17:58:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:58:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 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 435 [2022-01-31 17:58:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:33,447 INFO L225 Difference]: With dead ends: 1104 [2022-01-31 17:58:33,447 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 17:58:33,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:58:33,448 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2178 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:33,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2178 Valid, 43 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:58:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 17:58:33,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 592. [2022-01-31 17:58:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 587 states have (on average 1.373083475298126) internal successors, (806), 587 states have internal predecessors, (806), 3 states have call successors, (3), 3 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 17:58:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 810 transitions. [2022-01-31 17:58:33,567 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 810 transitions. Word has length 435 [2022-01-31 17:58:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:33,567 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 810 transitions. [2022-01-31 17:58:33,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 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 17:58:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 810 transitions. [2022-01-31 17:58:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 17:58:33,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:33,569 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:33,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:58:33,569 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1327409079, now seen corresponding path program 35 times [2022-01-31 17:58:33,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264363933] [2022-01-31 17:58:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:33,571 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:33,571 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:33,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:33,573 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:34,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:34,148 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 17:58:34,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:34,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264363933] [2022-01-31 17:58:34,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264363933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:34,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:34,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:58:34,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625511592] [2022-01-31 17:58:34,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:34,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:58:34,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:58:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:58:34,149 INFO L87 Difference]: Start difference. First operand 592 states and 810 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 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 17:58:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:35,444 INFO L93 Difference]: Finished difference Result 1134 states and 1584 transitions. [2022-01-31 17:58:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:58:35,445 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 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 447 [2022-01-31 17:58:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:35,447 INFO L225 Difference]: With dead ends: 1134 [2022-01-31 17:58:35,447 INFO L226 Difference]: Without dead ends: 621 [2022-01-31 17:58:35,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:58:35,449 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1842 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:35,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1842 Valid, 58 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:58:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-31 17:58:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 608. [2022-01-31 17:58:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 603 states have (on average 1.373134328358209) internal successors, (828), 603 states have internal predecessors, (828), 3 states have call successors, (3), 3 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 17:58:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 832 transitions. [2022-01-31 17:58:35,574 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 832 transitions. Word has length 447 [2022-01-31 17:58:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:35,574 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 832 transitions. [2022-01-31 17:58:35,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 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 17:58:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 832 transitions. [2022-01-31 17:58:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 17:58:35,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:35,576 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:35,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:58:35,576 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1550307068, now seen corresponding path program 36 times [2022-01-31 17:58:35,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:35,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673115755] [2022-01-31 17:58:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:35,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:35,580 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:35,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:35,582 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:36,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:36,157 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 17:58:36,157 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:36,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673115755] [2022-01-31 17:58:36,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673115755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:36,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:36,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:58:36,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104568990] [2022-01-31 17:58:36,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:36,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:58:36,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:58:36,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:58:36,160 INFO L87 Difference]: Start difference. First operand 608 states and 832 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 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 17:58:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:37,544 INFO L93 Difference]: Finished difference Result 1164 states and 1626 transitions. [2022-01-31 17:58:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:58:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 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 459 [2022-01-31 17:58:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:37,546 INFO L225 Difference]: With dead ends: 1164 [2022-01-31 17:58:37,546 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 17:58:37,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:58:37,548 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2078 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:37,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2078 Valid, 48 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:58:37,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 17:58:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 624. [2022-01-31 17:58:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 619 states have (on average 1.3731825525040389) internal successors, (850), 619 states have internal predecessors, (850), 3 states have call successors, (3), 3 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 17:58:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 854 transitions. [2022-01-31 17:58:37,688 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 854 transitions. Word has length 459 [2022-01-31 17:58:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:37,688 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 854 transitions. [2022-01-31 17:58:37,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 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 17:58:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 854 transitions. [2022-01-31 17:58:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 17:58:37,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:37,690 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:37,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:58:37,690 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:37,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:37,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1230979429, now seen corresponding path program 37 times [2022-01-31 17:58:37,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:37,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27872185] [2022-01-31 17:58:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:37,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:37,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:37,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:37,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:38,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:38,301 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 17:58:38,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:38,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27872185] [2022-01-31 17:58:38,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [27872185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:38,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:38,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:58:38,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41212824] [2022-01-31 17:58:38,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:38,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:58:38,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:58:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:58:38,303 INFO L87 Difference]: Start difference. First operand 624 states and 854 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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 17:58:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:39,765 INFO L93 Difference]: Finished difference Result 1194 states and 1668 transitions. [2022-01-31 17:58:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:58:39,766 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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 471 [2022-01-31 17:58:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:39,768 INFO L225 Difference]: With dead ends: 1194 [2022-01-31 17:58:39,768 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 17:58:39,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:58:39,769 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1989 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:39,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 48 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:58:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 17:58:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 640. [2022-01-31 17:58:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 635 states have (on average 1.373228346456693) internal successors, (872), 635 states have internal predecessors, (872), 3 states have call successors, (3), 3 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 17:58:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 876 transitions. [2022-01-31 17:58:39,928 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 876 transitions. Word has length 471 [2022-01-31 17:58:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:39,929 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 876 transitions. [2022-01-31 17:58:39,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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 17:58:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 876 transitions. [2022-01-31 17:58:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 17:58:39,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:39,931 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:39,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:58:39,931 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash -208400800, now seen corresponding path program 38 times [2022-01-31 17:58:39,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:39,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078159904] [2022-01-31 17:58:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:39,934 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:39,934 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:39,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:39,937 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:40,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:40,554 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 17:58:40,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:40,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078159904] [2022-01-31 17:58:40,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078159904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:40,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:40,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:58:40,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783142826] [2022-01-31 17:58:40,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:40,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:58:40,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:58:40,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:58:40,556 INFO L87 Difference]: Start difference. First operand 640 states and 876 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 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 17:58:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:41,705 INFO L93 Difference]: Finished difference Result 1224 states and 1710 transitions. [2022-01-31 17:58:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:58:41,706 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 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 483 [2022-01-31 17:58:41,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:41,707 INFO L225 Difference]: With dead ends: 1224 [2022-01-31 17:58:41,707 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 17:58:41,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:58:41,709 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2329 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:41,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2329 Valid, 38 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 17:58:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 656. [2022-01-31 17:58:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 651 states have (on average 1.3732718894009217) internal successors, (894), 651 states have internal predecessors, (894), 3 states have call successors, (3), 3 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 17:58:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 898 transitions. [2022-01-31 17:58:41,874 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 898 transitions. Word has length 483 [2022-01-31 17:58:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:41,875 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 898 transitions. [2022-01-31 17:58:41,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 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 17:58:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 898 transitions. [2022-01-31 17:58:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 17:58:41,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:41,877 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:41,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:58:41,877 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1943758719, now seen corresponding path program 39 times [2022-01-31 17:58:41,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:41,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258526501] [2022-01-31 17:58:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:41,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:41,879 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:41,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:41,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,472 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 17:58:42,473 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258526501] [2022-01-31 17:58:42,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258526501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:42,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:42,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:58:42,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763280077] [2022-01-31 17:58:42,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:42,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:58:42,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:42,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:58:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:58:42,474 INFO L87 Difference]: Start difference. First operand 656 states and 898 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 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 17:58:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:43,710 INFO L93 Difference]: Finished difference Result 1254 states and 1752 transitions. [2022-01-31 17:58:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:58:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 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 495 [2022-01-31 17:58:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:43,712 INFO L225 Difference]: With dead ends: 1254 [2022-01-31 17:58:43,712 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 17:58:43,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:58:43,713 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2149 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:43,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2149 Valid, 58 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 17:58:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 672. [2022-01-31 17:58:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 667 states have (on average 1.3733133433283358) internal successors, (916), 667 states have internal predecessors, (916), 3 states have call successors, (3), 3 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 17:58:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 920 transitions. [2022-01-31 17:58:43,890 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 920 transitions. Word has length 495 [2022-01-31 17:58:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:43,891 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 920 transitions. [2022-01-31 17:58:43,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 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 17:58:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 920 transitions. [2022-01-31 17:58:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 17:58:43,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:43,893 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:43,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:58:43,893 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:43,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1671473596, now seen corresponding path program 40 times [2022-01-31 17:58:43,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:43,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699683324] [2022-01-31 17:58:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:43,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:43,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:43,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:43,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,588 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 17:58:44,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699683324] [2022-01-31 17:58:44,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [699683324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:44,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:44,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:58:44,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087414064] [2022-01-31 17:58:44,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:44,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:58:44,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:58:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:58:44,590 INFO L87 Difference]: Start difference. First operand 672 states and 920 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 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 17:58:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:46,275 INFO L93 Difference]: Finished difference Result 1284 states and 1794 transitions. [2022-01-31 17:58:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:58:46,276 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 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 507 [2022-01-31 17:58:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:46,278 INFO L225 Difference]: With dead ends: 1284 [2022-01-31 17:58:46,278 INFO L226 Difference]: Without dead ends: 701 [2022-01-31 17:58:46,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:58:46,279 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2372 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2372 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:46,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2372 Valid, 38 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:58:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-31 17:58:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 688. [2022-01-31 17:58:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 683 states have (on average 1.3733528550512446) internal successors, (938), 683 states have internal predecessors, (938), 3 states have call successors, (3), 3 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 17:58:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 942 transitions. [2022-01-31 17:58:46,505 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 942 transitions. Word has length 507 [2022-01-31 17:58:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:46,506 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 942 transitions. [2022-01-31 17:58:46,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 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 17:58:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 942 transitions. [2022-01-31 17:58:46,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-01-31 17:58:46,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:46,508 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:46,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:58:46,508 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1820566115, now seen corresponding path program 41 times [2022-01-31 17:58:46,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:46,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112632226] [2022-01-31 17:58:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:46,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:46,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:46,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:46,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:47,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:47,283 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 17:58:47,283 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112632226] [2022-01-31 17:58:47,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112632226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:47,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:47,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:58:47,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058453935] [2022-01-31 17:58:47,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:47,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:58:47,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:47,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:58:47,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:58:47,284 INFO L87 Difference]: Start difference. First operand 688 states and 942 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 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 17:58:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:49,037 INFO L93 Difference]: Finished difference Result 1314 states and 1836 transitions. [2022-01-31 17:58:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:58:49,037 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 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 519 [2022-01-31 17:58:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:49,039 INFO L225 Difference]: With dead ends: 1314 [2022-01-31 17:58:49,039 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 17:58:49,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:58:49,040 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2699 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2699 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:49,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2699 Valid, 48 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:58:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 17:58:49,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 704. [2022-01-31 17:58:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 699 states have (on average 1.3733905579399142) internal successors, (960), 699 states have internal predecessors, (960), 3 states have call successors, (3), 3 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 17:58:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 964 transitions. [2022-01-31 17:58:49,243 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 964 transitions. Word has length 519 [2022-01-31 17:58:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:49,244 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 964 transitions. [2022-01-31 17:58:49,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 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 17:58:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 964 transitions. [2022-01-31 17:58:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 17:58:49,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:49,246 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:49,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:58:49,246 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:49,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:49,246 INFO L85 PathProgramCache]: Analyzing trace with hash -610467048, now seen corresponding path program 42 times [2022-01-31 17:58:49,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:49,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122575572] [2022-01-31 17:58:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:49,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:49,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:49,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:49,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:50,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:50,053 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 17:58:50,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:50,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122575572] [2022-01-31 17:58:50,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1122575572] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:50,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:50,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:58:50,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359235284] [2022-01-31 17:58:50,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:50,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:58:50,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:58:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:58:50,055 INFO L87 Difference]: Start difference. First operand 704 states and 964 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 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 17:58:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:51,925 INFO L93 Difference]: Finished difference Result 1344 states and 1878 transitions. [2022-01-31 17:58:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:58:51,925 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 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 531 [2022-01-31 17:58:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:51,927 INFO L225 Difference]: With dead ends: 1344 [2022-01-31 17:58:51,927 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 17:58:51,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:58:51,928 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2649 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2649 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:51,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2649 Valid, 48 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:58:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 17:58:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 720. [2022-01-31 17:58:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 715 states have (on average 1.3734265734265734) internal successors, (982), 715 states have internal predecessors, (982), 3 states have call successors, (3), 3 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 17:58:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 986 transitions. [2022-01-31 17:58:52,149 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 986 transitions. Word has length 531 [2022-01-31 17:58:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:52,149 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 986 transitions. [2022-01-31 17:58:52,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 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 17:58:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 986 transitions. [2022-01-31 17:58:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-31 17:58:52,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:52,152 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:52,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:58:52,153 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash -760115015, now seen corresponding path program 43 times [2022-01-31 17:58:52,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:52,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743713532] [2022-01-31 17:58:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:52,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:52,155 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:52,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:52,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:52,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:52,854 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 17:58:52,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:52,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743713532] [2022-01-31 17:58:52,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743713532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:52,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:52,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:58:52,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510056435] [2022-01-31 17:58:52,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:52,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:58:52,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:52,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:58:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:58:52,856 INFO L87 Difference]: Start difference. First operand 720 states and 986 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 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 17:58:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:54,310 INFO L93 Difference]: Finished difference Result 1374 states and 1920 transitions. [2022-01-31 17:58:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:58:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 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 543 [2022-01-31 17:58:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:54,312 INFO L225 Difference]: With dead ends: 1374 [2022-01-31 17:58:54,312 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 17:58:54,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:58:54,313 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2547 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2547 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:54,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2547 Valid, 43 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:58:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 17:58:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 736. [2022-01-31 17:58:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 731 states have (on average 1.3734610123119015) internal successors, (1004), 731 states have internal predecessors, (1004), 3 states have call successors, (3), 3 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 17:58:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1008 transitions. [2022-01-31 17:58:54,493 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1008 transitions. Word has length 543 [2022-01-31 17:58:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:54,493 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1008 transitions. [2022-01-31 17:58:54,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 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 17:58:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1008 transitions. [2022-01-31 17:58:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 17:58:54,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:54,495 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:54,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:58:54,495 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:54,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2036865652, now seen corresponding path program 44 times [2022-01-31 17:58:54,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:54,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970910885] [2022-01-31 17:58:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:54,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:54,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:54,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:54,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:55,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:55,145 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 17:58:55,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:55,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970910885] [2022-01-31 17:58:55,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [970910885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:55,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:55,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:58:55,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174181744] [2022-01-31 17:58:55,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:55,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:58:55,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:55,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:58:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:58:55,146 INFO L87 Difference]: Start difference. First operand 736 states and 1008 transitions. Second operand has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 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 17:58:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:56,654 INFO L93 Difference]: Finished difference Result 1404 states and 1962 transitions. [2022-01-31 17:58:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:58:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 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 555 [2022-01-31 17:58:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:56,657 INFO L225 Difference]: With dead ends: 1404 [2022-01-31 17:58:56,657 INFO L226 Difference]: Without dead ends: 765 [2022-01-31 17:58:56,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:58:56,658 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2445 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2445 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:56,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2445 Valid, 53 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:58:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-31 17:58:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 752. [2022-01-31 17:58:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 747 states have (on average 1.3734939759036144) internal successors, (1026), 747 states have internal predecessors, (1026), 3 states have call successors, (3), 3 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 17:58:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1030 transitions. [2022-01-31 17:58:56,846 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1030 transitions. Word has length 555 [2022-01-31 17:58:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:56,847 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1030 transitions. [2022-01-31 17:58:56,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 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 17:58:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1030 transitions. [2022-01-31 17:58:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-01-31 17:58:56,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:56,849 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:56,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:58:56,850 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:56,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1240518187, now seen corresponding path program 45 times [2022-01-31 17:58:56,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:56,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873708763] [2022-01-31 17:58:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:56,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:56,852 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:56,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:56,854 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:57,700 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 17:58:57,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873708763] [2022-01-31 17:58:57,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [873708763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:57,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:57,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:58:57,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286175045] [2022-01-31 17:58:57,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:57,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:58:57,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:57,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:58:57,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:58:57,701 INFO L87 Difference]: Start difference. First operand 752 states and 1030 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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 17:58:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:59,372 INFO L93 Difference]: Finished difference Result 1434 states and 2004 transitions. [2022-01-31 17:58:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:58:59,372 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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 567 [2022-01-31 17:58:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:59,374 INFO L225 Difference]: With dead ends: 1434 [2022-01-31 17:58:59,374 INFO L226 Difference]: Without dead ends: 781 [2022-01-31 17:58:59,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:58:59,375 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2473 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2473 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:59,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2473 Valid, 53 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:58:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-01-31 17:58:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 768. [2022-01-31 17:58:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 763 states have (on average 1.3735255570117955) internal successors, (1048), 763 states have internal predecessors, (1048), 3 states have call successors, (3), 3 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 17:58:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1052 transitions. [2022-01-31 17:58:59,569 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1052 transitions. Word has length 567 [2022-01-31 17:58:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:59,569 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1052 transitions. [2022-01-31 17:58:59,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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 17:58:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1052 transitions. [2022-01-31 17:58:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-01-31 17:58:59,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:59,571 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:59,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:58:59,571 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1893789648, now seen corresponding path program 46 times [2022-01-31 17:58:59,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:59,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091848057] [2022-01-31 17:58:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:59,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:59,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:59,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:59,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:00,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:00,584 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 17:59:00,584 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091848057] [2022-01-31 17:59:00,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091848057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:00,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:00,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:59:00,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657662081] [2022-01-31 17:59:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:00,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:59:00,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:59:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:59:00,585 INFO L87 Difference]: Start difference. First operand 768 states and 1052 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 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 17:59:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:02,735 INFO L93 Difference]: Finished difference Result 1464 states and 2046 transitions. [2022-01-31 17:59:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:59:02,735 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 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 579 [2022-01-31 17:59:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:02,737 INFO L225 Difference]: With dead ends: 1464 [2022-01-31 17:59:02,737 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 17:59:02,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:59:02,739 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2787 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2787 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:02,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2787 Valid, 53 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:59:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 17:59:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 784. [2022-01-31 17:59:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 779 states have (on average 1.373555840821566) internal successors, (1070), 779 states have internal predecessors, (1070), 3 states have call successors, (3), 3 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 17:59:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1074 transitions. [2022-01-31 17:59:02,963 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1074 transitions. Word has length 579 [2022-01-31 17:59:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:02,963 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1074 transitions. [2022-01-31 17:59:02,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 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 17:59:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1074 transitions. [2022-01-31 17:59:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-01-31 17:59:02,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:02,966 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:02,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:59:02,966 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:02,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1121992945, now seen corresponding path program 47 times [2022-01-31 17:59:02,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:02,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236857991] [2022-01-31 17:59:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:02,968 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:02,968 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:02,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:02,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:03,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:03,906 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 17:59:03,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:03,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236857991] [2022-01-31 17:59:03,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [236857991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:03,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:03,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:59:03,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037122231] [2022-01-31 17:59:03,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:03,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:59:03,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:59:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:59:03,908 INFO L87 Difference]: Start difference. First operand 784 states and 1074 transitions. Second operand has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:06,129 INFO L93 Difference]: Finished difference Result 1494 states and 2088 transitions. [2022-01-31 17:59:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:59:06,130 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 591 [2022-01-31 17:59:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:06,132 INFO L225 Difference]: With dead ends: 1494 [2022-01-31 17:59:06,132 INFO L226 Difference]: Without dead ends: 813 [2022-01-31 17:59:06,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:59:06,133 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2958 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2958 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:06,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2958 Valid, 48 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:59:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-31 17:59:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 800. [2022-01-31 17:59:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 795 states have (on average 1.3735849056603773) internal successors, (1092), 795 states have internal predecessors, (1092), 3 states have call successors, (3), 3 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 17:59:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1096 transitions. [2022-01-31 17:59:06,368 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1096 transitions. Word has length 591 [2022-01-31 17:59:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:06,368 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1096 transitions. [2022-01-31 17:59:06,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1096 transitions. [2022-01-31 17:59:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-01-31 17:59:06,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:06,371 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:06,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:59:06,371 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:06,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash -337214676, now seen corresponding path program 48 times [2022-01-31 17:59:06,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:06,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808233243] [2022-01-31 17:59:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:06,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:06,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:06,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:06,376 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:07,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:07,354 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 17:59:07,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:07,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808233243] [2022-01-31 17:59:07,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808233243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:07,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:07,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:59:07,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875014482] [2022-01-31 17:59:07,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:07,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:59:07,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:59:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:59:07,355 INFO L87 Difference]: Start difference. First operand 800 states and 1096 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:09,683 INFO L93 Difference]: Finished difference Result 1524 states and 2130 transitions. [2022-01-31 17:59:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:59:09,683 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 603 [2022-01-31 17:59:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:09,685 INFO L225 Difference]: With dead ends: 1524 [2022-01-31 17:59:09,685 INFO L226 Difference]: Without dead ends: 829 [2022-01-31 17:59:09,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:59:09,686 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2921 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2921 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:09,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2921 Valid, 53 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:59:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-31 17:59:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 816. [2022-01-31 17:59:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 811 states have (on average 1.373612823674476) internal successors, (1114), 811 states have internal predecessors, (1114), 3 states have call successors, (3), 3 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 17:59:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1118 transitions. [2022-01-31 17:59:09,905 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1118 transitions. Word has length 603 [2022-01-31 17:59:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:09,905 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1118 transitions. [2022-01-31 17:59:09,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1118 transitions. [2022-01-31 17:59:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2022-01-31 17:59:09,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:09,907 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:09,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:59:09,907 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1217413619, now seen corresponding path program 49 times [2022-01-31 17:59:09,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:09,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543642399] [2022-01-31 17:59:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:09,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:09,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:09,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:09,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:10,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:10,972 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 17:59:10,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543642399] [2022-01-31 17:59:10,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [543642399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:10,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:10,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:59:10,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84466748] [2022-01-31 17:59:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:10,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:59:10,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:59:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:59:10,974 INFO L87 Difference]: Start difference. First operand 816 states and 1118 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:12,989 INFO L93 Difference]: Finished difference Result 1554 states and 2172 transitions. [2022-01-31 17:59:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:59:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 615 [2022-01-31 17:59:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:12,992 INFO L225 Difference]: With dead ends: 1554 [2022-01-31 17:59:12,992 INFO L226 Difference]: Without dead ends: 845 [2022-01-31 17:59:12,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:59:12,993 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2949 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2949 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:12,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2949 Valid, 58 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:59:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-31 17:59:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 832. [2022-01-31 17:59:13,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 827 states have (on average 1.373639661426844) internal successors, (1136), 827 states have internal predecessors, (1136), 3 states have call successors, (3), 3 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 17:59:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1140 transitions. [2022-01-31 17:59:13,227 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1140 transitions. Word has length 615 [2022-01-31 17:59:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:13,227 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1140 transitions. [2022-01-31 17:59:13,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1140 transitions. [2022-01-31 17:59:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2022-01-31 17:59:13,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:13,230 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:13,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:59:13,230 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash -363342712, now seen corresponding path program 50 times [2022-01-31 17:59:13,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:13,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464746823] [2022-01-31 17:59:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:13,232 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:13,232 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:13,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:13,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:14,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:14,311 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 17:59:14,312 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464746823] [2022-01-31 17:59:14,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [464746823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:14,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:14,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:59:14,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811353858] [2022-01-31 17:59:14,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:14,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:59:14,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:59:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:59:14,313 INFO L87 Difference]: Start difference. First operand 832 states and 1140 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:16,794 INFO L93 Difference]: Finished difference Result 1584 states and 2214 transitions. [2022-01-31 17:59:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:59:16,794 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 627 [2022-01-31 17:59:16,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:16,796 INFO L225 Difference]: With dead ends: 1584 [2022-01-31 17:59:16,797 INFO L226 Difference]: Without dead ends: 861 [2022-01-31 17:59:16,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:59:16,798 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3692 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3692 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:16,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3692 Valid, 48 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:59:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-31 17:59:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 848. [2022-01-31 17:59:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 843 states have (on average 1.3736654804270463) internal successors, (1158), 843 states have internal predecessors, (1158), 3 states have call successors, (3), 3 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 17:59:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1162 transitions. [2022-01-31 17:59:17,053 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1162 transitions. Word has length 627 [2022-01-31 17:59:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:17,053 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 1162 transitions. [2022-01-31 17:59:17,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1162 transitions. [2022-01-31 17:59:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2022-01-31 17:59:17,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:17,056 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:17,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:59:17,056 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash 721987881, now seen corresponding path program 51 times [2022-01-31 17:59:17,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435148798] [2022-01-31 17:59:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:17,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:17,058 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:17,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:17,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:18,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:18,107 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 17:59:18,107 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:18,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435148798] [2022-01-31 17:59:18,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435148798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:18,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:18,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:59:18,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221951369] [2022-01-31 17:59:18,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:18,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:59:18,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:18,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:59:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:59:18,109 INFO L87 Difference]: Start difference. First operand 848 states and 1162 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:20,726 INFO L93 Difference]: Finished difference Result 1614 states and 2256 transitions. [2022-01-31 17:59:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:59:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 639 [2022-01-31 17:59:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:20,728 INFO L225 Difference]: With dead ends: 1614 [2022-01-31 17:59:20,728 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 17:59:20,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:59:20,730 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3356 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:20,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3356 Valid, 38 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:59:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 17:59:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 864. [2022-01-31 17:59:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 859 states have (on average 1.3736903376018625) internal successors, (1180), 859 states have internal predecessors, (1180), 3 states have call successors, (3), 3 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 17:59:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1184 transitions. [2022-01-31 17:59:20,994 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1184 transitions. Word has length 639 [2022-01-31 17:59:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:20,994 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1184 transitions. [2022-01-31 17:59:20,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1184 transitions. [2022-01-31 17:59:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-01-31 17:59:20,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:20,998 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:20,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:59:20,998 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:20,998 INFO L85 PathProgramCache]: Analyzing trace with hash 571728868, now seen corresponding path program 52 times [2022-01-31 17:59:20,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:20,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094507369] [2022-01-31 17:59:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:21,000 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:21,000 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:21,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:21,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:22,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:22,146 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 17:59:22,146 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094507369] [2022-01-31 17:59:22,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094507369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:22,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:22,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:59:22,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720752312] [2022-01-31 17:59:22,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:22,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:59:22,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:59:22,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:59:22,147 INFO L87 Difference]: Start difference. First operand 864 states and 1184 transitions. Second operand has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:24,484 INFO L93 Difference]: Finished difference Result 1644 states and 2298 transitions. [2022-01-31 17:59:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:59:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 651 [2022-01-31 17:59:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:24,487 INFO L225 Difference]: With dead ends: 1644 [2022-01-31 17:59:24,487 INFO L226 Difference]: Without dead ends: 893 [2022-01-31 17:59:24,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:59:24,488 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3631 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3631 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:24,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3631 Valid, 33 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:59:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-31 17:59:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 880. [2022-01-31 17:59:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 875 states have (on average 1.3737142857142857) internal successors, (1202), 875 states have internal predecessors, (1202), 3 states have call successors, (3), 3 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 17:59:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1206 transitions. [2022-01-31 17:59:24,772 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1206 transitions. Word has length 651 [2022-01-31 17:59:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:24,772 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1206 transitions. [2022-01-31 17:59:24,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1206 transitions. [2022-01-31 17:59:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-01-31 17:59:24,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:24,775 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:24,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:59:24,775 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:24,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:24,776 INFO L85 PathProgramCache]: Analyzing trace with hash 771097157, now seen corresponding path program 53 times [2022-01-31 17:59:24,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:24,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207107175] [2022-01-31 17:59:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:24,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:24,778 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:24,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:24,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:25,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:25,902 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 17:59:25,902 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207107175] [2022-01-31 17:59:25,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [207107175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:25,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:25,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:59:25,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135949626] [2022-01-31 17:59:25,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:25,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:59:25,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:59:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:59:25,904 INFO L87 Difference]: Start difference. First operand 880 states and 1206 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:28,270 INFO L93 Difference]: Finished difference Result 1674 states and 2340 transitions. [2022-01-31 17:59:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:59:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 663 [2022-01-31 17:59:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:28,285 INFO L225 Difference]: With dead ends: 1674 [2022-01-31 17:59:28,285 INFO L226 Difference]: Without dead ends: 909 [2022-01-31 17:59:28,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:59:28,287 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3048 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3048 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:28,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3048 Valid, 48 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:59:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-31 17:59:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 896. [2022-01-31 17:59:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 891 states have (on average 1.3737373737373737) internal successors, (1224), 891 states have internal predecessors, (1224), 3 states have call successors, (3), 3 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 17:59:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1228 transitions. [2022-01-31 17:59:28,567 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1228 transitions. Word has length 663 [2022-01-31 17:59:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:28,568 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1228 transitions. [2022-01-31 17:59:28,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1228 transitions. [2022-01-31 17:59:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2022-01-31 17:59:28,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:28,570 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:28,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:59:28,571 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash -554061504, now seen corresponding path program 54 times [2022-01-31 17:59:28,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:28,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143611134] [2022-01-31 17:59:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:28,575 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:28,575 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:28,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:28,592 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:29,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:29,857 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 17:59:29,857 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:29,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143611134] [2022-01-31 17:59:29,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2143611134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:29,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:29,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:59:29,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302118888] [2022-01-31 17:59:29,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:29,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:59:29,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:59:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:59:29,858 INFO L87 Difference]: Start difference. First operand 896 states and 1228 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:32,604 INFO L93 Difference]: Finished difference Result 1704 states and 2382 transitions. [2022-01-31 17:59:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:59:32,604 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 675 [2022-01-31 17:59:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:32,606 INFO L225 Difference]: With dead ends: 1704 [2022-01-31 17:59:32,606 INFO L226 Difference]: Without dead ends: 925 [2022-01-31 17:59:32,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:59:32,609 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3596 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3596 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:32,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3596 Valid, 48 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:59:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-01-31 17:59:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 912. [2022-01-31 17:59:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 907 states have (on average 1.3737596471885336) internal successors, (1246), 907 states have internal predecessors, (1246), 3 states have call successors, (3), 3 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 17:59:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1250 transitions. [2022-01-31 17:59:32,896 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1250 transitions. Word has length 675 [2022-01-31 17:59:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:32,897 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1250 transitions. [2022-01-31 17:59:32,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1250 transitions. [2022-01-31 17:59:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2022-01-31 17:59:32,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:32,900 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:32,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:59:32,900 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1770178913, now seen corresponding path program 55 times [2022-01-31 17:59:32,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:32,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891366584] [2022-01-31 17:59:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:32,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:32,902 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:32,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:32,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:34,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:34,115 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 17:59:34,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:34,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891366584] [2022-01-31 17:59:34,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [891366584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:34,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:34,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:59:34,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848053613] [2022-01-31 17:59:34,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:34,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:59:34,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:59:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:59:34,117 INFO L87 Difference]: Start difference. First operand 912 states and 1250 transitions. Second operand has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:36,986 INFO L93 Difference]: Finished difference Result 1734 states and 2424 transitions. [2022-01-31 17:59:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:59:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 687 [2022-01-31 17:59:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:36,988 INFO L225 Difference]: With dead ends: 1734 [2022-01-31 17:59:36,988 INFO L226 Difference]: Without dead ends: 941 [2022-01-31 17:59:36,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:59:36,989 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3195 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3195 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:36,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3195 Valid, 48 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:59:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-31 17:59:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 928. [2022-01-31 17:59:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 923 states have (on average 1.3737811484290356) internal successors, (1268), 923 states have internal predecessors, (1268), 3 states have call successors, (3), 3 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 17:59:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1272 transitions. [2022-01-31 17:59:37,283 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1272 transitions. Word has length 687 [2022-01-31 17:59:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:37,283 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1272 transitions. [2022-01-31 17:59:37,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1272 transitions. [2022-01-31 17:59:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2022-01-31 17:59:37,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:37,286 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:37,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:59:37,286 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash -488096612, now seen corresponding path program 56 times [2022-01-31 17:59:37,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:37,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763913956] [2022-01-31 17:59:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:37,288 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:37,288 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:37,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:37,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:38,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:38,550 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 17:59:38,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:38,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763913956] [2022-01-31 17:59:38,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [763913956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:38,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:38,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:59:38,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732004479] [2022-01-31 17:59:38,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:38,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:59:38,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:59:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:59:38,552 INFO L87 Difference]: Start difference. First operand 928 states and 1272 transitions. Second operand has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:40,976 INFO L93 Difference]: Finished difference Result 1764 states and 2466 transitions. [2022-01-31 17:59:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:59:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 699 [2022-01-31 17:59:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:40,978 INFO L225 Difference]: With dead ends: 1764 [2022-01-31 17:59:40,978 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 17:59:40,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:59:40,980 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3652 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3652 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:40,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3652 Valid, 38 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:59:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 17:59:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 944. [2022-01-31 17:59:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 939 states have (on average 1.3738019169329074) internal successors, (1290), 939 states have internal predecessors, (1290), 3 states have call successors, (3), 3 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 17:59:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1294 transitions. [2022-01-31 17:59:41,288 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1294 transitions. Word has length 699 [2022-01-31 17:59:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:41,288 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1294 transitions. [2022-01-31 17:59:41,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1294 transitions. [2022-01-31 17:59:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-01-31 17:59:41,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:41,291 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:41,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:59:41,291 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:41,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1073348221, now seen corresponding path program 57 times [2022-01-31 17:59:41,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:41,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434685846] [2022-01-31 17:59:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:41,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:41,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:41,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:41,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:42,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:42,450 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 17:59:42,450 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:42,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434685846] [2022-01-31 17:59:42,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434685846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:42,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:42,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:59:42,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711611336] [2022-01-31 17:59:42,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:42,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:59:42,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:42,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:59:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:59:42,452 INFO L87 Difference]: Start difference. First operand 944 states and 1294 transitions. Second operand has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:45,506 INFO L93 Difference]: Finished difference Result 1794 states and 2508 transitions. [2022-01-31 17:59:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:59:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 711 [2022-01-31 17:59:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:45,507 INFO L225 Difference]: With dead ends: 1794 [2022-01-31 17:59:45,508 INFO L226 Difference]: Without dead ends: 973 [2022-01-31 17:59:45,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:59:45,509 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4330 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4330 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:45,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4330 Valid, 38 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:59:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-01-31 17:59:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 960. [2022-01-31 17:59:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 955 states have (on average 1.3738219895287958) internal successors, (1312), 955 states have internal predecessors, (1312), 3 states have call successors, (3), 3 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 17:59:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1316 transitions. [2022-01-31 17:59:45,822 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1316 transitions. Word has length 711 [2022-01-31 17:59:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:45,823 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1316 transitions. [2022-01-31 17:59:45,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1316 transitions. [2022-01-31 17:59:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2022-01-31 17:59:45,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:45,826 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:45,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:59:45,826 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1170114040, now seen corresponding path program 58 times [2022-01-31 17:59:45,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:45,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534539234] [2022-01-31 17:59:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:45,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:45,828 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:45,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:45,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:47,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:47,125 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 17:59:47,126 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534539234] [2022-01-31 17:59:47,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [534539234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:47,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:47,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:59:47,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073606622] [2022-01-31 17:59:47,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:47,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:59:47,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:47,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:59:47,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:59:47,127 INFO L87 Difference]: Start difference. First operand 960 states and 1316 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:50,325 INFO L93 Difference]: Finished difference Result 1824 states and 2550 transitions. [2022-01-31 17:59:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:59:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 723 [2022-01-31 17:59:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:50,326 INFO L225 Difference]: With dead ends: 1824 [2022-01-31 17:59:50,326 INFO L226 Difference]: Without dead ends: 989 [2022-01-31 17:59:50,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:59:50,331 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4124 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4124 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:50,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4124 Valid, 33 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:59:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-31 17:59:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 976. [2022-01-31 17:59:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 971 states have (on average 1.3738414006179196) internal successors, (1334), 971 states have internal predecessors, (1334), 3 states have call successors, (3), 3 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 17:59:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1338 transitions. [2022-01-31 17:59:50,891 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1338 transitions. Word has length 723 [2022-01-31 17:59:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:50,891 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1338 transitions. [2022-01-31 17:59:50,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1338 transitions. [2022-01-31 17:59:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-01-31 17:59:50,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:50,896 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:50,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:59:50,896 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:50,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1822859673, now seen corresponding path program 59 times [2022-01-31 17:59:50,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:50,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731765310] [2022-01-31 17:59:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:50,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:50,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:50,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:50,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:52,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:52,056 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 17:59:52,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731765310] [2022-01-31 17:59:52,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1731765310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:52,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:52,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:59:52,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48150960] [2022-01-31 17:59:52,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:52,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:59:52,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:59:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:59:52,058 INFO L87 Difference]: Start difference. First operand 976 states and 1338 transitions. Second operand has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:55,349 INFO L93 Difference]: Finished difference Result 1854 states and 2592 transitions. [2022-01-31 17:59:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:59:55,349 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 735 [2022-01-31 17:59:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:55,350 INFO L225 Difference]: With dead ends: 1854 [2022-01-31 17:59:55,350 INFO L226 Difference]: Without dead ends: 1005 [2022-01-31 17:59:55,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:59:55,352 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4815 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4815 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:55,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4815 Valid, 33 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:59:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-31 17:59:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 992. [2022-01-31 17:59:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 987 states have (on average 1.3738601823708207) internal successors, (1356), 987 states have internal predecessors, (1356), 3 states have call successors, (3), 3 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 17:59:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1360 transitions. [2022-01-31 17:59:55,678 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1360 transitions. Word has length 735 [2022-01-31 17:59:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:55,678 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1360 transitions. [2022-01-31 17:59:55,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1360 transitions. [2022-01-31 17:59:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-01-31 17:59:55,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:55,682 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:55,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:59:55,683 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1432063316, now seen corresponding path program 60 times [2022-01-31 17:59:55,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163633875] [2022-01-31 17:59:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:55,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:55,685 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:55,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:55,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:57,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:57,232 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 17:59:57,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:57,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163633875] [2022-01-31 17:59:57,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [163633875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:57,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:57,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:59:57,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968571649] [2022-01-31 17:59:57,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:57,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:59:57,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:59:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:59:57,235 INFO L87 Difference]: Start difference. First operand 992 states and 1360 transitions. Second operand has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:00,218 INFO L93 Difference]: Finished difference Result 1884 states and 2634 transitions. [2022-01-31 18:00:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:00:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 747 [2022-01-31 18:00:00,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:00,220 INFO L225 Difference]: With dead ends: 1884 [2022-01-31 18:00:00,220 INFO L226 Difference]: Without dead ends: 1021 [2022-01-31 18:00:00,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:00:00,221 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4726 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4726 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:00,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4726 Valid, 28 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:00:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-31 18:00:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 1008. [2022-01-31 18:00:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1003 states have (on average 1.3738783649052841) internal successors, (1378), 1003 states have internal predecessors, (1378), 3 states have call successors, (3), 3 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 18:00:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1382 transitions. [2022-01-31 18:00:00,573 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1382 transitions. Word has length 747 [2022-01-31 18:00:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:00,574 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1382 transitions. [2022-01-31 18:00:00,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1382 transitions. [2022-01-31 18:00:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2022-01-31 18:00:00,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:00,577 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:00,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:00:00,577 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:00,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1546407243, now seen corresponding path program 61 times [2022-01-31 18:00:00,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:00,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400941424] [2022-01-31 18:00:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:00,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:00,581 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:00,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:00,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:01,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:01,973 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 18:00:01,973 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:01,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400941424] [2022-01-31 18:00:01,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [400941424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:01,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:01,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:00:01,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481273754] [2022-01-31 18:00:01,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:01,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:00:01,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:00:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:00:01,976 INFO L87 Difference]: Start difference. First operand 1008 states and 1382 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:05,150 INFO L93 Difference]: Finished difference Result 1914 states and 2676 transitions. [2022-01-31 18:00:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:00:05,150 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 759 [2022-01-31 18:00:05,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:05,152 INFO L225 Difference]: With dead ends: 1914 [2022-01-31 18:00:05,152 INFO L226 Difference]: Without dead ends: 1037 [2022-01-31 18:00:05,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:00:05,153 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4455 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 732 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4455 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 732 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:05,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4455 Valid, 48 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [732 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:00:05,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-31 18:00:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1024. [2022-01-31 18:00:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1019 states have (on average 1.3738959764474976) internal successors, (1400), 1019 states have internal predecessors, (1400), 3 states have call successors, (3), 3 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 18:00:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1404 transitions. [2022-01-31 18:00:05,498 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1404 transitions. Word has length 759 [2022-01-31 18:00:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:05,498 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1404 transitions. [2022-01-31 18:00:05,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1404 transitions. [2022-01-31 18:00:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-01-31 18:00:05,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:05,502 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:05,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:00:05,502 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:05,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:05,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1973310128, now seen corresponding path program 62 times [2022-01-31 18:00:05,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:05,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601189073] [2022-01-31 18:00:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:05,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:05,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:05,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:05,508 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:06,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:06,856 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 18:00:06,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:06,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601189073] [2022-01-31 18:00:06,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601189073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:06,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:06,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:00:06,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477582132] [2022-01-31 18:00:06,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:06,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:00:06,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:06,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:00:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:00:06,859 INFO L87 Difference]: Start difference. First operand 1024 states and 1404 transitions. Second operand has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:10,396 INFO L93 Difference]: Finished difference Result 1944 states and 2718 transitions. [2022-01-31 18:00:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:00:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 771 [2022-01-31 18:00:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:10,398 INFO L225 Difference]: With dead ends: 1944 [2022-01-31 18:00:10,398 INFO L226 Difference]: Without dead ends: 1053 [2022-01-31 18:00:10,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:00:10,401 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4574 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4574 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:10,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4574 Valid, 38 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:00:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-01-31 18:00:10,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1040. [2022-01-31 18:00:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1035 states have (on average 1.373913043478261) internal successors, (1422), 1035 states have internal predecessors, (1422), 3 states have call successors, (3), 3 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 18:00:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1426 transitions. [2022-01-31 18:00:10,769 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1426 transitions. Word has length 771 [2022-01-31 18:00:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:10,769 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1426 transitions. [2022-01-31 18:00:10,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1426 transitions. [2022-01-31 18:00:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-01-31 18:00:10,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:10,773 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:10,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:00:10,773 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:10,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:10,773 INFO L85 PathProgramCache]: Analyzing trace with hash 852242897, now seen corresponding path program 63 times [2022-01-31 18:00:10,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:10,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263314414] [2022-01-31 18:00:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:10,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:10,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:10,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:10,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:12,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:12,388 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 18:00:12,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263314414] [2022-01-31 18:00:12,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263314414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:12,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:12,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:00:12,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090929290] [2022-01-31 18:00:12,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:12,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:00:12,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:00:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:00:12,390 INFO L87 Difference]: Start difference. First operand 1040 states and 1426 transitions. Second operand has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:16,260 INFO L93 Difference]: Finished difference Result 1974 states and 2760 transitions. [2022-01-31 18:00:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:00:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 783 [2022-01-31 18:00:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:16,262 INFO L225 Difference]: With dead ends: 1974 [2022-01-31 18:00:16,262 INFO L226 Difference]: Without dead ends: 1069 [2022-01-31 18:00:16,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:00:16,264 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4173 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4173 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:16,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4173 Valid, 58 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:00:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-31 18:00:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1056. [2022-01-31 18:00:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1051 states have (on average 1.373929590865842) internal successors, (1444), 1051 states have internal predecessors, (1444), 3 states have call successors, (3), 3 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 18:00:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1448 transitions. [2022-01-31 18:00:16,696 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1448 transitions. Word has length 783 [2022-01-31 18:00:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:16,696 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1448 transitions. [2022-01-31 18:00:16,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1448 transitions. [2022-01-31 18:00:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-01-31 18:00:16,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:16,701 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:16,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:00:16,701 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash 6673932, now seen corresponding path program 64 times [2022-01-31 18:00:16,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:16,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625094955] [2022-01-31 18:00:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:16,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:16,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:16,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:16,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:18,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:18,467 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 18:00:18,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:18,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625094955] [2022-01-31 18:00:18,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625094955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:18,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:18,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:00:18,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284160786] [2022-01-31 18:00:18,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:18,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:00:18,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:18,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:00:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:00:18,470 INFO L87 Difference]: Start difference. First operand 1056 states and 1448 transitions. Second operand has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:23,400 INFO L93 Difference]: Finished difference Result 2004 states and 2802 transitions. [2022-01-31 18:00:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:00:23,400 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 795 [2022-01-31 18:00:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:23,402 INFO L225 Difference]: With dead ends: 2004 [2022-01-31 18:00:23,402 INFO L226 Difference]: Without dead ends: 1085 [2022-01-31 18:00:23,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:00:23,404 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4539 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4539 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:23,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4539 Valid, 43 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:00:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-01-31 18:00:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1072. [2022-01-31 18:00:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1067 states have (on average 1.3739456419868792) internal successors, (1466), 1067 states have internal predecessors, (1466), 3 states have call successors, (3), 3 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 18:00:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1470 transitions. [2022-01-31 18:00:23,948 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1470 transitions. Word has length 795 [2022-01-31 18:00:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:23,948 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1470 transitions. [2022-01-31 18:00:23,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1470 transitions. [2022-01-31 18:00:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2022-01-31 18:00:23,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:23,954 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:23,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:00:23,954 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1613029651, now seen corresponding path program 65 times [2022-01-31 18:00:23,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:23,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086364530] [2022-01-31 18:00:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:23,976 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:23,976 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:23,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:23,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:25,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:25,963 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 18:00:25,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086364530] [2022-01-31 18:00:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086364530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:25,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:25,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:00:25,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794375544] [2022-01-31 18:00:25,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:25,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:00:25,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:00:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:00:25,966 INFO L87 Difference]: Start difference. First operand 1072 states and 1470 transitions. Second operand has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:29,423 INFO L93 Difference]: Finished difference Result 2034 states and 2844 transitions. [2022-01-31 18:00:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:00:29,423 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 807 [2022-01-31 18:00:29,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:29,425 INFO L225 Difference]: With dead ends: 2034 [2022-01-31 18:00:29,426 INFO L226 Difference]: Without dead ends: 1101 [2022-01-31 18:00:29,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:00:29,435 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4034 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4034 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:29,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4034 Valid, 48 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:00:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-01-31 18:00:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1088. [2022-01-31 18:00:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1083 states have (on average 1.373961218836565) internal successors, (1488), 1083 states have internal predecessors, (1488), 3 states have call successors, (3), 3 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 18:00:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1492 transitions. [2022-01-31 18:00:29,952 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1492 transitions. Word has length 807 [2022-01-31 18:00:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:29,954 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1492 transitions. [2022-01-31 18:00:29,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1492 transitions. [2022-01-31 18:00:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2022-01-31 18:00:29,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:29,958 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:29,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:00:29,959 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:29,959 INFO L85 PathProgramCache]: Analyzing trace with hash 630265704, now seen corresponding path program 66 times [2022-01-31 18:00:29,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:29,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004743706] [2022-01-31 18:00:29,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:29,976 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:29,976 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:29,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:29,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:31,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:31,795 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 18:00:31,795 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004743706] [2022-01-31 18:00:31,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004743706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:31,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:31,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:00:31,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772189668] [2022-01-31 18:00:31,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:31,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:00:31,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:31,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:00:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:00:31,796 INFO L87 Difference]: Start difference. First operand 1088 states and 1492 transitions. Second operand has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:35,753 INFO L93 Difference]: Finished difference Result 2064 states and 2886 transitions. [2022-01-31 18:00:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:00:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 819 [2022-01-31 18:00:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:35,755 INFO L225 Difference]: With dead ends: 2064 [2022-01-31 18:00:35,755 INFO L226 Difference]: Without dead ends: 1117 [2022-01-31 18:00:35,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:00:35,757 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4296 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4296 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:35,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4296 Valid, 53 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:00:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-31 18:00:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1104. [2022-01-31 18:00:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1099 states have (on average 1.3739763421292084) internal successors, (1510), 1099 states have internal predecessors, (1510), 3 states have call successors, (3), 3 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 18:00:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1514 transitions. [2022-01-31 18:00:36,180 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1514 transitions. Word has length 819 [2022-01-31 18:00:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:36,180 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1514 transitions. [2022-01-31 18:00:36,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1514 transitions. [2022-01-31 18:00:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2022-01-31 18:00:36,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:36,184 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:36,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:00:36,184 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:36,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1246460425, now seen corresponding path program 67 times [2022-01-31 18:00:36,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:36,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840118146] [2022-01-31 18:00:36,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:36,186 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:36,186 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:36,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:36,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:38,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:38,053 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 18:00:38,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:38,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840118146] [2022-01-31 18:00:38,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1840118146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:38,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:38,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:00:38,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85673857] [2022-01-31 18:00:38,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:38,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:00:38,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:00:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:00:38,056 INFO L87 Difference]: Start difference. First operand 1104 states and 1514 transitions. Second operand has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:43,077 INFO L93 Difference]: Finished difference Result 2094 states and 2928 transitions. [2022-01-31 18:00:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:00:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 831 [2022-01-31 18:00:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:43,080 INFO L225 Difference]: With dead ends: 2094 [2022-01-31 18:00:43,080 INFO L226 Difference]: Without dead ends: 1133 [2022-01-31 18:00:43,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:00:43,083 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5494 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 899 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5494 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 899 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:43,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5494 Valid, 48 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [899 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:00:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-01-31 18:00:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1120. [2022-01-31 18:00:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1115 states have (on average 1.3739910313901345) internal successors, (1532), 1115 states have internal predecessors, (1532), 3 states have call successors, (3), 3 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 18:00:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1536 transitions. [2022-01-31 18:00:43,700 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1536 transitions. Word has length 831 [2022-01-31 18:00:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:43,700 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1536 transitions. [2022-01-31 18:00:43,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1536 transitions. [2022-01-31 18:00:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2022-01-31 18:00:43,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:43,705 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:43,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:00:43,706 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash -889252156, now seen corresponding path program 68 times [2022-01-31 18:00:43,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:43,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346866249] [2022-01-31 18:00:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:43,711 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:43,711 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:43,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:43,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:45,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:45,689 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 18:00:45,689 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:45,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346866249] [2022-01-31 18:00:45,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346866249] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:45,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:45,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:00:45,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398663075] [2022-01-31 18:00:45,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:45,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:00:45,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:45,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:00:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:00:45,691 INFO L87 Difference]: Start difference. First operand 1120 states and 1536 transitions. Second operand has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:50,169 INFO L93 Difference]: Finished difference Result 2124 states and 2970 transitions. [2022-01-31 18:00:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:00:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 843 [2022-01-31 18:00:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:50,171 INFO L225 Difference]: With dead ends: 2124 [2022-01-31 18:00:50,171 INFO L226 Difference]: Without dead ends: 1149 [2022-01-31 18:00:50,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:00:50,173 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4287 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4287 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:50,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4287 Valid, 43 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:00:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-01-31 18:00:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1136. [2022-01-31 18:00:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1131 states have (on average 1.3740053050397878) internal successors, (1554), 1131 states have internal predecessors, (1554), 3 states have call successors, (3), 3 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 18:00:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1558 transitions. [2022-01-31 18:00:50,628 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1558 transitions. Word has length 843 [2022-01-31 18:00:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:50,628 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1558 transitions. [2022-01-31 18:00:50,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1558 transitions. [2022-01-31 18:00:50,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2022-01-31 18:00:50,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:50,632 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:50,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:00:50,632 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:50,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash 174605093, now seen corresponding path program 69 times [2022-01-31 18:00:50,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:50,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589950325] [2022-01-31 18:00:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:50,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:50,634 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:50,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:50,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:52,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:52,187 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 18:00:52,187 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:52,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589950325] [2022-01-31 18:00:52,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [589950325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:52,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:52,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:00:52,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494585489] [2022-01-31 18:00:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:52,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:00:52,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:00:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:00:52,190 INFO L87 Difference]: Start difference. First operand 1136 states and 1558 transitions. Second operand has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:56,556 INFO L93 Difference]: Finished difference Result 2154 states and 3012 transitions. [2022-01-31 18:00:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:00:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 855 [2022-01-31 18:00:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:56,558 INFO L225 Difference]: With dead ends: 2154 [2022-01-31 18:00:56,559 INFO L226 Difference]: Without dead ends: 1165 [2022-01-31 18:00:56,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:00:56,560 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3938 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3938 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:56,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3938 Valid, 73 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:00:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-31 18:00:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1152. [2022-01-31 18:00:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1147 states have (on average 1.3740191804707933) internal successors, (1576), 1147 states have internal predecessors, (1576), 3 states have call successors, (3), 3 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 18:00:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1580 transitions. [2022-01-31 18:00:57,036 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1580 transitions. Word has length 855 [2022-01-31 18:00:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:57,036 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1580 transitions. [2022-01-31 18:00:57,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1580 transitions. [2022-01-31 18:00:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2022-01-31 18:00:57,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:57,041 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:57,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:00:57,041 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:57,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1821299744, now seen corresponding path program 70 times [2022-01-31 18:00:57,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:57,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536767851] [2022-01-31 18:00:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:57,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:57,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:57,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:57,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:58,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:58,915 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 18:00:58,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:58,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536767851] [2022-01-31 18:00:58,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1536767851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:58,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:58,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:00:58,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85213658] [2022-01-31 18:00:58,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:58,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:00:58,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:00:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:00:58,918 INFO L87 Difference]: Start difference. First operand 1152 states and 1580 transitions. Second operand has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:03,221 INFO L93 Difference]: Finished difference Result 2184 states and 3054 transitions. [2022-01-31 18:01:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:01:03,221 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 867 [2022-01-31 18:01:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:03,223 INFO L225 Difference]: With dead ends: 2184 [2022-01-31 18:01:03,223 INFO L226 Difference]: Without dead ends: 1181 [2022-01-31 18:01:03,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:01:03,225 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4759 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 788 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4759 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 788 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:03,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4759 Valid, 48 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [788 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:01:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-01-31 18:01:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1168. [2022-01-31 18:01:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1163 states have (on average 1.3740326741186586) internal successors, (1598), 1163 states have internal predecessors, (1598), 3 states have call successors, (3), 3 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 18:01:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1602 transitions. [2022-01-31 18:01:03,709 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1602 transitions. Word has length 867 [2022-01-31 18:01:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:03,709 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1602 transitions. [2022-01-31 18:01:03,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1602 transitions. [2022-01-31 18:01:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2022-01-31 18:01:03,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:03,713 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:03,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:01:03,713 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash -780371391, now seen corresponding path program 71 times [2022-01-31 18:01:03,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:03,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717107401] [2022-01-31 18:01:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:03,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:03,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:03,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:03,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:05,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:05,621 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 18:01:05,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717107401] [2022-01-31 18:01:05,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [717107401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:05,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:05,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:01:05,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521963131] [2022-01-31 18:01:05,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:05,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:01:05,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:01:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:01:05,624 INFO L87 Difference]: Start difference. First operand 1168 states and 1602 transitions. Second operand has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:10,244 INFO L93 Difference]: Finished difference Result 2214 states and 3096 transitions. [2022-01-31 18:01:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:01:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 879 [2022-01-31 18:01:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:10,247 INFO L225 Difference]: With dead ends: 2214 [2022-01-31 18:01:10,247 INFO L226 Difference]: Without dead ends: 1197 [2022-01-31 18:01:10,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:01:10,250 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4501 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4501 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:10,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4501 Valid, 63 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:01:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-01-31 18:01:10,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1184. [2022-01-31 18:01:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1179 states have (on average 1.3740458015267176) internal successors, (1620), 1179 states have internal predecessors, (1620), 3 states have call successors, (3), 3 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 18:01:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1624 transitions. [2022-01-31 18:01:10,924 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1624 transitions. Word has length 879 [2022-01-31 18:01:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:10,925 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1624 transitions. [2022-01-31 18:01:10,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:10,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1624 transitions. [2022-01-31 18:01:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2022-01-31 18:01:10,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:10,931 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:10,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:01:10,931 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:10,931 INFO L85 PathProgramCache]: Analyzing trace with hash -65056900, now seen corresponding path program 72 times [2022-01-31 18:01:10,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:10,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567575367] [2022-01-31 18:01:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:10,934 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:10,934 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:10,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:10,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:12,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:12,744 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 18:01:12,744 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567575367] [2022-01-31 18:01:12,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567575367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:12,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:12,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:01:12,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442597181] [2022-01-31 18:01:12,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:12,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:01:12,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:01:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:01:12,751 INFO L87 Difference]: Start difference. First operand 1184 states and 1624 transitions. Second operand has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:18,082 INFO L93 Difference]: Finished difference Result 2244 states and 3138 transitions. [2022-01-31 18:01:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:01:18,082 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 891 [2022-01-31 18:01:18,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:18,103 INFO L225 Difference]: With dead ends: 2244 [2022-01-31 18:01:18,103 INFO L226 Difference]: Without dead ends: 1213 [2022-01-31 18:01:18,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:01:18,106 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4555 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4555 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:18,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4555 Valid, 58 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:01:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-01-31 18:01:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1200. [2022-01-31 18:01:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1195 states have (on average 1.3740585774058578) internal successors, (1642), 1195 states have internal predecessors, (1642), 3 states have call successors, (3), 3 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 18:01:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1646 transitions. [2022-01-31 18:01:18,859 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1646 transitions. Word has length 891 [2022-01-31 18:01:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1646 transitions. [2022-01-31 18:01:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1646 transitions. [2022-01-31 18:01:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2022-01-31 18:01:18,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:18,863 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:18,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:01:18,864 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1238572893, now seen corresponding path program 73 times [2022-01-31 18:01:18,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756081097] [2022-01-31 18:01:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:18,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:18,866 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:18,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:18,871 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:20,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:20,588 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 18:01:20,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756081097] [2022-01-31 18:01:20,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [756081097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:20,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:20,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:01:20,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746784486] [2022-01-31 18:01:20,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:20,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:01:20,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:01:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:01:20,590 INFO L87 Difference]: Start difference. First operand 1200 states and 1646 transitions. Second operand has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:24,895 INFO L93 Difference]: Finished difference Result 2274 states and 3180 transitions. [2022-01-31 18:01:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:01:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 903 [2022-01-31 18:01:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:24,898 INFO L225 Difference]: With dead ends: 2274 [2022-01-31 18:01:24,898 INFO L226 Difference]: Without dead ends: 1229 [2022-01-31 18:01:24,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:01:24,900 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5558 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5558 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:24,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5558 Valid, 38 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:01:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-01-31 18:01:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1216. [2022-01-31 18:01:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1211 states have (on average 1.3740710156895128) internal successors, (1664), 1211 states have internal predecessors, (1664), 3 states have call successors, (3), 3 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 18:01:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1668 transitions. [2022-01-31 18:01:25,607 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1668 transitions. Word has length 903 [2022-01-31 18:01:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:25,607 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1668 transitions. [2022-01-31 18:01:25,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1668 transitions. [2022-01-31 18:01:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-01-31 18:01:25,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:25,613 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:25,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:01:25,614 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1047557928, now seen corresponding path program 74 times [2022-01-31 18:01:25,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:25,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141558102] [2022-01-31 18:01:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:25,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:25,617 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:25,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:25,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:28,200 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 18:01:28,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:28,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141558102] [2022-01-31 18:01:28,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141558102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:28,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:28,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:01:28,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529891057] [2022-01-31 18:01:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:28,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:01:28,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:01:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:01:28,204 INFO L87 Difference]: Start difference. First operand 1216 states and 1668 transitions. Second operand has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:34,662 INFO L93 Difference]: Finished difference Result 2304 states and 3222 transitions. [2022-01-31 18:01:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:01:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 915 [2022-01-31 18:01:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:34,664 INFO L225 Difference]: With dead ends: 2304 [2022-01-31 18:01:34,664 INFO L226 Difference]: Without dead ends: 1245 [2022-01-31 18:01:34,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:01:34,666 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4195 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4195 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:34,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4195 Valid, 58 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:01:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-01-31 18:01:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1232. [2022-01-31 18:01:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1227 states have (on average 1.374083129584352) internal successors, (1686), 1227 states have internal predecessors, (1686), 3 states have call successors, (3), 3 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 18:01:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1690 transitions. [2022-01-31 18:01:35,377 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1690 transitions. Word has length 915 [2022-01-31 18:01:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:35,377 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1690 transitions. [2022-01-31 18:01:35,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1690 transitions. [2022-01-31 18:01:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2022-01-31 18:01:35,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:35,384 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:35,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:01:35,384 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1991717497, now seen corresponding path program 75 times [2022-01-31 18:01:35,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:35,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617202389] [2022-01-31 18:01:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:35,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:35,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:35,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:35,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:37,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:37,918 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 18:01:37,918 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617202389] [2022-01-31 18:01:37,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617202389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:37,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:37,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:01:37,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989236171] [2022-01-31 18:01:37,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:37,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:01:37,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:01:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:01:37,921 INFO L87 Difference]: Start difference. First operand 1232 states and 1690 transitions. Second operand has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:44,614 INFO L93 Difference]: Finished difference Result 2334 states and 3264 transitions. [2022-01-31 18:01:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:01:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 927 [2022-01-31 18:01:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:44,616 INFO L225 Difference]: With dead ends: 2334 [2022-01-31 18:01:44,617 INFO L226 Difference]: Without dead ends: 1261 [2022-01-31 18:01:44,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:01:44,619 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5601 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5601 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:44,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5601 Valid, 53 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:01:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-01-31 18:01:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1248. [2022-01-31 18:01:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1243 states have (on average 1.3740949316170554) internal successors, (1708), 1243 states have internal predecessors, (1708), 3 states have call successors, (3), 3 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 18:01:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1712 transitions. [2022-01-31 18:01:45,160 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1712 transitions. Word has length 927 [2022-01-31 18:01:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:45,160 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1712 transitions. [2022-01-31 18:01:45,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1712 transitions. [2022-01-31 18:01:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-01-31 18:01:45,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:45,165 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:45,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:01:45,165 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash 985563188, now seen corresponding path program 76 times [2022-01-31 18:01:45,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:45,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462017013] [2022-01-31 18:01:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:45,167 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:45,167 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:45,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:45,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:47,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:47,513 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 18:01:47,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:47,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462017013] [2022-01-31 18:01:47,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [462017013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:47,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:47,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:01:47,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11106026] [2022-01-31 18:01:47,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:47,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:01:47,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:01:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:01:47,515 INFO L87 Difference]: Start difference. First operand 1248 states and 1712 transitions. Second operand has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:53,051 INFO L93 Difference]: Finished difference Result 2364 states and 3306 transitions. [2022-01-31 18:01:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:01:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 939 [2022-01-31 18:01:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:53,053 INFO L225 Difference]: With dead ends: 2364 [2022-01-31 18:01:53,053 INFO L226 Difference]: Without dead ends: 1277 [2022-01-31 18:01:53,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:01:53,056 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5239 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5239 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 866 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:53,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5239 Valid, 43 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [866 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:01:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-01-31 18:01:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1264. [2022-01-31 18:01:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1259 states have (on average 1.374106433677522) internal successors, (1730), 1259 states have internal predecessors, (1730), 3 states have call successors, (3), 3 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 18:01:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1734 transitions. [2022-01-31 18:01:53,594 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1734 transitions. Word has length 939 [2022-01-31 18:01:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:53,594 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1734 transitions. [2022-01-31 18:01:53,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1734 transitions. [2022-01-31 18:01:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2022-01-31 18:01:53,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:53,599 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:53,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:01:53,599 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1416868757, now seen corresponding path program 77 times [2022-01-31 18:01:53,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:53,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853204363] [2022-01-31 18:01:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:53,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:53,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:53,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:53,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:56,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:56,161 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 18:01:56,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:56,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853204363] [2022-01-31 18:01:56,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1853204363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:56,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:56,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:01:56,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434887800] [2022-01-31 18:01:56,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:56,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:01:56,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:01:56,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:01:56,165 INFO L87 Difference]: Start difference. First operand 1264 states and 1734 transitions. Second operand has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:02,992 INFO L93 Difference]: Finished difference Result 2394 states and 3348 transitions. [2022-01-31 18:02:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:02:02,992 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 951 [2022-01-31 18:02:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:02,994 INFO L225 Difference]: With dead ends: 2394 [2022-01-31 18:02:02,994 INFO L226 Difference]: Without dead ends: 1293 [2022-01-31 18:02:03,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:02:03,001 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5267 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5267 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:03,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5267 Valid, 28 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:02:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-01-31 18:02:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1280. [2022-01-31 18:02:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1275 states have (on average 1.3741176470588234) internal successors, (1752), 1275 states have internal predecessors, (1752), 3 states have call successors, (3), 3 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 18:02:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1756 transitions. [2022-01-31 18:02:03,749 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1756 transitions. Word has length 951 [2022-01-31 18:02:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:03,749 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1756 transitions. [2022-01-31 18:02:03,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1756 transitions. [2022-01-31 18:02:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2022-01-31 18:02:03,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:03,756 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:03,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:02:03,756 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash -74762864, now seen corresponding path program 78 times [2022-01-31 18:02:03,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:03,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355231728] [2022-01-31 18:02:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:03,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:03,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:03,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:03,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:06,147 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 18:02:06,147 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355231728] [2022-01-31 18:02:06,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355231728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:06,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:06,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:02:06,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174812387] [2022-01-31 18:02:06,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:06,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:02:06,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:06,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:02:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:02:06,150 INFO L87 Difference]: Start difference. First operand 1280 states and 1756 transitions. Second operand has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:13,164 INFO L93 Difference]: Finished difference Result 2424 states and 3390 transitions. [2022-01-31 18:02:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:02:13,164 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 963 [2022-01-31 18:02:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:13,166 INFO L225 Difference]: With dead ends: 2424 [2022-01-31 18:02:13,166 INFO L226 Difference]: Without dead ends: 1309 [2022-01-31 18:02:13,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:02:13,169 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5997 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5997 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:13,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5997 Valid, 33 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [985 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:02:13,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-01-31 18:02:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1296. [2022-01-31 18:02:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1291 states have (on average 1.3741285824941905) internal successors, (1774), 1291 states have internal predecessors, (1774), 3 states have call successors, (3), 3 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 18:02:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1778 transitions. [2022-01-31 18:02:13,956 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1778 transitions. Word has length 963 [2022-01-31 18:02:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:13,957 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 1778 transitions. [2022-01-31 18:02:13,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1778 transitions. [2022-01-31 18:02:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2022-01-31 18:02:13,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:13,966 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:13,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:02:13,970 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2018747057, now seen corresponding path program 79 times [2022-01-31 18:02:13,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:13,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447039589] [2022-01-31 18:02:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:13,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:13,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:13,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:13,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:15,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:15,928 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 18:02:15,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:15,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447039589] [2022-01-31 18:02:15,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447039589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:15,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:15,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:02:15,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130037854] [2022-01-31 18:02:15,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:15,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:02:15,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:02:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:02:15,931 INFO L87 Difference]: Start difference. First operand 1296 states and 1778 transitions. Second operand has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:20,921 INFO L93 Difference]: Finished difference Result 2454 states and 3432 transitions. [2022-01-31 18:02:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:02:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 975 [2022-01-31 18:02:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:20,922 INFO L225 Difference]: With dead ends: 2454 [2022-01-31 18:02:20,922 INFO L226 Difference]: Without dead ends: 1325 [2022-01-31 18:02:20,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:02:20,925 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5960 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5960 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:20,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5960 Valid, 38 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:02:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-01-31 18:02:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1312. [2022-01-31 18:02:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1307 states have (on average 1.3741392501912777) internal successors, (1796), 1307 states have internal predecessors, (1796), 3 states have call successors, (3), 3 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 18:02:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1800 transitions. [2022-01-31 18:02:21,514 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1800 transitions. Word has length 975 [2022-01-31 18:02:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:21,514 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1800 transitions. [2022-01-31 18:02:21,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1800 transitions. [2022-01-31 18:02:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2022-01-31 18:02:21,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:21,519 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:21,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:02:21,520 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1915442964, now seen corresponding path program 80 times [2022-01-31 18:02:21,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:21,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030545054] [2022-01-31 18:02:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:21,522 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:21,522 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:21,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:21,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:23,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:23,896 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 18:02:23,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:23,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030545054] [2022-01-31 18:02:23,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030545054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:23,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:23,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:02:23,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891021186] [2022-01-31 18:02:23,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:23,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:02:23,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:02:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:02:23,899 INFO L87 Difference]: Start difference. First operand 1312 states and 1800 transitions. Second operand has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:30,590 INFO L93 Difference]: Finished difference Result 2484 states and 3474 transitions. [2022-01-31 18:02:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:02:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 987 [2022-01-31 18:02:30,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:30,606 INFO L225 Difference]: With dead ends: 2484 [2022-01-31 18:02:30,606 INFO L226 Difference]: Without dead ends: 1341 [2022-01-31 18:02:30,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:02:30,609 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5247 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5247 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:30,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5247 Valid, 38 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:02:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-01-31 18:02:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1328. [2022-01-31 18:02:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1323 states have (on average 1.3741496598639455) internal successors, (1818), 1323 states have internal predecessors, (1818), 3 states have call successors, (3), 3 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 18:02:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1822 transitions. [2022-01-31 18:02:31,247 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1822 transitions. Word has length 987 [2022-01-31 18:02:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:31,248 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 1822 transitions. [2022-01-31 18:02:31,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1822 transitions. [2022-01-31 18:02:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2022-01-31 18:02:31,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:31,254 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:31,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:02:31,254 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1331560499, now seen corresponding path program 81 times [2022-01-31 18:02:31,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:31,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895232881] [2022-01-31 18:02:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:31,259 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:31,259 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:31,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:31,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:33,848 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 18:02:33,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895232881] [2022-01-31 18:02:33,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [895232881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:33,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:33,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:02:33,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553969189] [2022-01-31 18:02:33,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:33,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:02:33,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:33,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:02:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:02:33,851 INFO L87 Difference]: Start difference. First operand 1328 states and 1822 transitions. Second operand has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:40,258 INFO L93 Difference]: Finished difference Result 2514 states and 3516 transitions. [2022-01-31 18:02:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:02:40,259 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 999 [2022-01-31 18:02:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:40,260 INFO L225 Difference]: With dead ends: 2514 [2022-01-31 18:02:40,260 INFO L226 Difference]: Without dead ends: 1357 [2022-01-31 18:02:40,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:02:40,262 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5912 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5912 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:40,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5912 Valid, 43 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:02:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-01-31 18:02:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1344. [2022-01-31 18:02:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1339 states have (on average 1.3741598207617625) internal successors, (1840), 1339 states have internal predecessors, (1840), 3 states have call successors, (3), 3 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 18:02:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1844 transitions. [2022-01-31 18:02:40,862 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1844 transitions. Word has length 999 [2022-01-31 18:02:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:40,862 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 1844 transitions. [2022-01-31 18:02:40,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1844 transitions. [2022-01-31 18:02:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2022-01-31 18:02:40,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:40,867 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:40,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:02:40,868 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1366940232, now seen corresponding path program 82 times [2022-01-31 18:02:40,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:40,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720183758] [2022-01-31 18:02:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:40,870 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:40,870 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:40,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:40,877 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:43,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:43,344 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 18:02:43,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:43,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720183758] [2022-01-31 18:02:43,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [720183758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:43,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:43,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:02:43,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369369682] [2022-01-31 18:02:43,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:43,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:02:43,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:43,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:02:43,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:02:43,347 INFO L87 Difference]: Start difference. First operand 1344 states and 1844 transitions. Second operand has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:49,603 INFO L93 Difference]: Finished difference Result 2544 states and 3558 transitions. [2022-01-31 18:02:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:02:49,604 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1011 [2022-01-31 18:02:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:49,605 INFO L225 Difference]: With dead ends: 2544 [2022-01-31 18:02:49,605 INFO L226 Difference]: Without dead ends: 1373 [2022-01-31 18:02:49,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:02:49,608 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5186 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5186 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:49,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5186 Valid, 58 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:02:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-01-31 18:02:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1360. [2022-01-31 18:02:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1355 states have (on average 1.374169741697417) internal successors, (1862), 1355 states have internal predecessors, (1862), 3 states have call successors, (3), 3 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 18:02:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1866 transitions. [2022-01-31 18:02:50,252 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1866 transitions. Word has length 1011 [2022-01-31 18:02:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:50,252 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 1866 transitions. [2022-01-31 18:02:50,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1866 transitions. [2022-01-31 18:02:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2022-01-31 18:02:50,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:50,258 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:02:50,258 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:50,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1532376343, now seen corresponding path program 83 times [2022-01-31 18:02:50,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:50,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51906752] [2022-01-31 18:02:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:50,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:50,261 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:50,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:50,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:52,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:52,918 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 18:02:52,918 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51906752] [2022-01-31 18:02:52,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [51906752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:52,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:52,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:02:52,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510837883] [2022-01-31 18:02:52,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:52,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:02:52,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:52,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:02:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:02:52,921 INFO L87 Difference]: Start difference. First operand 1360 states and 1866 transitions. Second operand has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:59,542 INFO L93 Difference]: Finished difference Result 2574 states and 3600 transitions. [2022-01-31 18:02:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:02:59,542 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1023 [2022-01-31 18:02:59,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:59,544 INFO L225 Difference]: With dead ends: 2574 [2022-01-31 18:02:59,544 INFO L226 Difference]: Without dead ends: 1389 [2022-01-31 18:02:59,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:02:59,546 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5526 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5526 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:59,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5526 Valid, 68 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:02:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-01-31 18:03:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1376. [2022-01-31 18:03:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1371 states have (on average 1.37417943107221) internal successors, (1884), 1371 states have internal predecessors, (1884), 3 states have call successors, (3), 3 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 18:03:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1888 transitions. [2022-01-31 18:03:00,199 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1888 transitions. Word has length 1023 [2022-01-31 18:03:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:00,200 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 1888 transitions. [2022-01-31 18:03:00,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1888 transitions. [2022-01-31 18:03:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2022-01-31 18:03:00,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:00,236 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:00,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:03:00,236 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:00,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1549388196, now seen corresponding path program 84 times [2022-01-31 18:03:00,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:00,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223183414] [2022-01-31 18:03:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:00,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:00,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:00,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:00,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:02,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:02,639 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 18:03:02,639 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:02,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223183414] [2022-01-31 18:03:02,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1223183414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:02,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:02,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:03:02,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555951683] [2022-01-31 18:03:02,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:02,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:03:02,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:03:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:03:02,642 INFO L87 Difference]: Start difference. First operand 1376 states and 1888 transitions. Second operand has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:08,063 INFO L93 Difference]: Finished difference Result 2604 states and 3642 transitions. [2022-01-31 18:03:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:03:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1035 [2022-01-31 18:03:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:08,065 INFO L225 Difference]: With dead ends: 2604 [2022-01-31 18:03:08,065 INFO L226 Difference]: Without dead ends: 1405 [2022-01-31 18:03:08,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:03:08,067 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5502 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5502 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:08,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5502 Valid, 38 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:03:08,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-01-31 18:03:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1392. [2022-01-31 18:03:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1387 states have (on average 1.3741888968997837) internal successors, (1906), 1387 states have internal predecessors, (1906), 3 states have call successors, (3), 3 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 18:03:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1910 transitions. [2022-01-31 18:03:08,745 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1910 transitions. Word has length 1035 [2022-01-31 18:03:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:08,745 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 1910 transitions. [2022-01-31 18:03:08,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1910 transitions. [2022-01-31 18:03:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2022-01-31 18:03:08,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:08,751 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:08,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:03:08,751 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1958085637, now seen corresponding path program 85 times [2022-01-31 18:03:08,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:08,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726474161] [2022-01-31 18:03:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:08,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:08,753 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:08,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:08,761 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:11,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:11,370 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 18:03:11,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:11,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726474161] [2022-01-31 18:03:11,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [726474161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:11,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:11,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:03:11,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832104438] [2022-01-31 18:03:11,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:11,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:03:11,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:11,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:03:11,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:03:11,373 INFO L87 Difference]: Start difference. First operand 1392 states and 1910 transitions. Second operand has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:18,129 INFO L93 Difference]: Finished difference Result 2634 states and 3684 transitions. [2022-01-31 18:03:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:03:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1047 [2022-01-31 18:03:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:18,130 INFO L225 Difference]: With dead ends: 2634 [2022-01-31 18:03:18,130 INFO L226 Difference]: Without dead ends: 1421 [2022-01-31 18:03:18,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:03:18,133 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6349 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 1046 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6349 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1046 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:18,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6349 Valid, 43 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1046 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:03:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-01-31 18:03:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1408. [2022-01-31 18:03:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1403 states have (on average 1.3741981468282252) internal successors, (1928), 1403 states have internal predecessors, (1928), 3 states have call successors, (3), 3 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 18:03:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1932 transitions. [2022-01-31 18:03:18,933 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1932 transitions. Word has length 1047 [2022-01-31 18:03:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:18,934 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 1932 transitions. [2022-01-31 18:03:18,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1932 transitions. [2022-01-31 18:03:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2022-01-31 18:03:18,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:18,941 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:18,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:03:18,941 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1515419392, now seen corresponding path program 86 times [2022-01-31 18:03:18,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:18,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271474993] [2022-01-31 18:03:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:18,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:18,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:18,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:18,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:21,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:21,127 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 18:03:21,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:21,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271474993] [2022-01-31 18:03:21,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271474993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:21,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:21,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:03:21,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867345928] [2022-01-31 18:03:21,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:21,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:03:21,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:03:21,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:03:21,130 INFO L87 Difference]: Start difference. First operand 1408 states and 1932 transitions. Second operand has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 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 18:03:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:27,796 INFO L93 Difference]: Finished difference Result 2664 states and 3726 transitions. [2022-01-31 18:03:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:03:27,796 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1059 [2022-01-31 18:03:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:27,798 INFO L225 Difference]: With dead ends: 2664 [2022-01-31 18:03:27,798 INFO L226 Difference]: Without dead ends: 1437 [2022-01-31 18:03:27,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:03:27,800 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6260 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6260 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:27,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6260 Valid, 33 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:03:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-01-31 18:03:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1424. [2022-01-31 18:03:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1419 states have (on average 1.3742071881606766) internal successors, (1950), 1419 states have internal predecessors, (1950), 3 states have call successors, (3), 3 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 18:03:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 1954 transitions. [2022-01-31 18:03:28,519 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 1954 transitions. Word has length 1059 [2022-01-31 18:03:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:28,519 INFO L470 AbstractCegarLoop]: Abstraction has 1424 states and 1954 transitions. [2022-01-31 18:03:28,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 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 18:03:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 1954 transitions. [2022-01-31 18:03:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2022-01-31 18:03:28,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:28,525 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:28,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:03:28,526 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:28,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1511107361, now seen corresponding path program 87 times [2022-01-31 18:03:28,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:28,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960824879] [2022-01-31 18:03:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:28,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:28,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:28,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:28,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:31,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:31,449 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 18:03:31,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:31,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960824879] [2022-01-31 18:03:31,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [960824879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:31,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:31,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:03:31,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264042865] [2022-01-31 18:03:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:31,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:03:31,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:03:31,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:03:31,452 INFO L87 Difference]: Start difference. First operand 1424 states and 1954 transitions. Second operand has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (3), 3 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 18:03:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:38,016 INFO L93 Difference]: Finished difference Result 2694 states and 3768 transitions. [2022-01-31 18:03:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:03:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1071 [2022-01-31 18:03:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:38,018 INFO L225 Difference]: With dead ends: 2694 [2022-01-31 18:03:38,018 INFO L226 Difference]: Without dead ends: 1453 [2022-01-31 18:03:38,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:03:38,020 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6418 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 1052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6418 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:38,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6418 Valid, 43 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1052 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:03:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-01-31 18:03:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1440. [2022-01-31 18:03:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1435 states have (on average 1.3742160278745645) internal successors, (1972), 1435 states have internal predecessors, (1972), 3 states have call successors, (3), 3 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 18:03:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1976 transitions. [2022-01-31 18:03:38,734 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1976 transitions. Word has length 1071 [2022-01-31 18:03:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:38,734 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 1976 transitions. [2022-01-31 18:03:38,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (3), 3 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 18:03:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1976 transitions. [2022-01-31 18:03:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1084 [2022-01-31 18:03:38,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:38,740 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:03:38,740 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1833296476, now seen corresponding path program 88 times [2022-01-31 18:03:38,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:38,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452622194] [2022-01-31 18:03:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:38,742 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:38,743 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:38,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:38,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:41,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:41,512 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 18:03:41,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:41,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452622194] [2022-01-31 18:03:41,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [452622194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:41,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:41,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:03:41,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200142681] [2022-01-31 18:03:41,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:41,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:03:41,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:41,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:03:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:03:41,515 INFO L87 Difference]: Start difference. First operand 1440 states and 1976 transitions. Second operand has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:48,258 INFO L93 Difference]: Finished difference Result 2724 states and 3810 transitions. [2022-01-31 18:03:48,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:03:48,258 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1083 [2022-01-31 18:03:48,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:48,260 INFO L225 Difference]: With dead ends: 2724 [2022-01-31 18:03:48,260 INFO L226 Difference]: Without dead ends: 1469 [2022-01-31 18:03:48,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:03:48,266 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5926 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 978 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5926 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 978 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:48,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5926 Valid, 53 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [978 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:03:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2022-01-31 18:03:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1456. [2022-01-31 18:03:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1451 states have (on average 1.3742246726395588) internal successors, (1994), 1451 states have internal predecessors, (1994), 3 states have call successors, (3), 3 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 18:03:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 1998 transitions. [2022-01-31 18:03:48,981 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 1998 transitions. Word has length 1083 [2022-01-31 18:03:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:48,981 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 1998 transitions. [2022-01-31 18:03:48,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 1998 transitions. [2022-01-31 18:03:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2022-01-31 18:03:48,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:48,987 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:48,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:03:48,987 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1191690301, now seen corresponding path program 89 times [2022-01-31 18:03:48,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:48,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829290551] [2022-01-31 18:03:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:48,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:48,989 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:48,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:48,997 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:51,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:51,987 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 18:03:51,987 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:51,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829290551] [2022-01-31 18:03:51,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829290551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:51,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:51,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:03:51,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880208766] [2022-01-31 18:03:51,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:51,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:03:51,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:03:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:03:51,990 INFO L87 Difference]: Start difference. First operand 1456 states and 1998 transitions. Second operand has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 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 18:03:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:59,452 INFO L93 Difference]: Finished difference Result 2754 states and 3852 transitions. [2022-01-31 18:03:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:03:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1095 [2022-01-31 18:03:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:59,454 INFO L225 Difference]: With dead ends: 2754 [2022-01-31 18:03:59,454 INFO L226 Difference]: Without dead ends: 1485 [2022-01-31 18:03:59,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:03:59,456 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5733 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5733 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:59,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5733 Valid, 63 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:03:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2022-01-31 18:04:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1472. [2022-01-31 18:04:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1467 states have (on average 1.3742331288343559) internal successors, (2016), 1467 states have internal predecessors, (2016), 3 states have call successors, (3), 3 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 18:04:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2020 transitions. [2022-01-31 18:04:00,177 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2020 transitions. Word has length 1095 [2022-01-31 18:04:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:00,177 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 2020 transitions. [2022-01-31 18:04:00,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 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 18:04:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2020 transitions. [2022-01-31 18:04:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2022-01-31 18:04:00,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:00,183 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:00,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:04:00,183 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 219155384, now seen corresponding path program 90 times [2022-01-31 18:04:00,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:00,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308998571] [2022-01-31 18:04:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:00,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:00,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:00,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:00,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:02,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:02,555 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 18:04:02,556 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308998571] [2022-01-31 18:04:02,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308998571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:02,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:02,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:04:02,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565093310] [2022-01-31 18:04:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:02,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:04:02,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:04:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:04:02,558 INFO L87 Difference]: Start difference. First operand 1472 states and 2020 transitions. Second operand has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (3), 3 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 18:04:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:09,208 INFO L93 Difference]: Finished difference Result 2784 states and 3894 transitions. [2022-01-31 18:04:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:04:09,209 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1107 [2022-01-31 18:04:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:09,210 INFO L225 Difference]: With dead ends: 2784 [2022-01-31 18:04:09,210 INFO L226 Difference]: Without dead ends: 1501 [2022-01-31 18:04:09,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:04:09,213 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5956 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5956 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:09,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5956 Valid, 53 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:04:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-01-31 18:04:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1488. [2022-01-31 18:04:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1483 states have (on average 1.3742414025623735) internal successors, (2038), 1483 states have internal predecessors, (2038), 3 states have call successors, (3), 3 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 18:04:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2042 transitions. [2022-01-31 18:04:09,955 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2042 transitions. Word has length 1107 [2022-01-31 18:04:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:09,955 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 2042 transitions. [2022-01-31 18:04:09,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (3), 3 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 18:04:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2042 transitions. [2022-01-31 18:04:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2022-01-31 18:04:09,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:09,961 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:09,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:04:09,961 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2031926439, now seen corresponding path program 91 times [2022-01-31 18:04:09,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:09,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213834159] [2022-01-31 18:04:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:09,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:09,967 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:09,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:09,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:12,621 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 18:04:12,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:12,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213834159] [2022-01-31 18:04:12,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213834159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:12,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:12,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:04:12,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518038156] [2022-01-31 18:04:12,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:12,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:04:12,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:04:12,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:04:12,627 INFO L87 Difference]: Start difference. First operand 1488 states and 2042 transitions. Second operand has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:21,735 INFO L93 Difference]: Finished difference Result 2814 states and 3936 transitions. [2022-01-31 18:04:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:04:21,735 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1119 [2022-01-31 18:04:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:21,737 INFO L225 Difference]: With dead ends: 2814 [2022-01-31 18:04:21,737 INFO L226 Difference]: Without dead ends: 1517 [2022-01-31 18:04:21,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:04:21,740 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6920 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 1133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6920 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:21,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6920 Valid, 38 Invalid, 2747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1133 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:04:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-01-31 18:04:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1504. [2022-01-31 18:04:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1499 states have (on average 1.3742494996664443) internal successors, (2060), 1499 states have internal predecessors, (2060), 3 states have call successors, (3), 3 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 18:04:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2064 transitions. [2022-01-31 18:04:22,764 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2064 transitions. Word has length 1119 [2022-01-31 18:04:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:22,765 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 2064 transitions. [2022-01-31 18:04:22,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2064 transitions. [2022-01-31 18:04:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2022-01-31 18:04:22,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:22,773 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:22,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:04:22,773 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash -409930988, now seen corresponding path program 92 times [2022-01-31 18:04:22,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:22,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501532520] [2022-01-31 18:04:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:22,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:22,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:22,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:22,787 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:26,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:26,451 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 18:04:26,451 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:26,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501532520] [2022-01-31 18:04:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [501532520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:26,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:26,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:04:26,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48052188] [2022-01-31 18:04:26,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:26,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:04:26,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:04:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:04:26,455 INFO L87 Difference]: Start difference. First operand 1504 states and 2064 transitions. Second operand has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 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 18:04:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:37,100 INFO L93 Difference]: Finished difference Result 2844 states and 3978 transitions. [2022-01-31 18:04:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:04:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1131 [2022-01-31 18:04:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:37,103 INFO L225 Difference]: With dead ends: 2844 [2022-01-31 18:04:37,103 INFO L226 Difference]: Without dead ends: 1533 [2022-01-31 18:04:37,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:04:37,106 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7104 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 1166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7104 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1166 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:37,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7104 Valid, 33 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1166 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:04:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-01-31 18:04:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1520. [2022-01-31 18:04:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1515 states have (on average 1.3742574257425744) internal successors, (2082), 1515 states have internal predecessors, (2082), 3 states have call successors, (3), 3 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 18:04:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2086 transitions. [2022-01-31 18:04:38,140 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2086 transitions. Word has length 1131 [2022-01-31 18:04:38,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:38,140 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 2086 transitions. [2022-01-31 18:04:38,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 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 18:04:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2086 transitions. [2022-01-31 18:04:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1144 [2022-01-31 18:04:38,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:38,165 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:38,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:04:38,165 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1575957621, now seen corresponding path program 93 times [2022-01-31 18:04:38,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:38,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121847300] [2022-01-31 18:04:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:38,168 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:38,168 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:38,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:38,179 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:41,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:41,884 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 18:04:41,884 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:41,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121847300] [2022-01-31 18:04:41,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [121847300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:41,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:41,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:04:41,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433091425] [2022-01-31 18:04:41,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:41,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:04:41,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:04:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:04:41,888 INFO L87 Difference]: Start difference. First operand 1520 states and 2086 transitions. Second operand has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (3), 3 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 18:04:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:52,720 INFO L93 Difference]: Finished difference Result 2874 states and 4020 transitions. [2022-01-31 18:04:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:04:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1143 [2022-01-31 18:04:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:52,723 INFO L225 Difference]: With dead ends: 2874 [2022-01-31 18:04:52,723 INFO L226 Difference]: Without dead ends: 1549 [2022-01-31 18:04:52,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:04:52,726 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6326 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 1044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6326 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1044 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:52,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6326 Valid, 58 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1044 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:04:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-01-31 18:04:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1536. [2022-01-31 18:04:53,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1531 states have (on average 1.3742651861528412) internal successors, (2104), 1531 states have internal predecessors, (2104), 3 states have call successors, (3), 3 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 18:04:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2108 transitions. [2022-01-31 18:04:53,653 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2108 transitions. Word has length 1143 [2022-01-31 18:04:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:53,654 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 2108 transitions. [2022-01-31 18:04:53,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (3), 3 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 18:04:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2108 transitions. [2022-01-31 18:04:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2022-01-31 18:04:53,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:53,660 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:53,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:04:53,660 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:53,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1062758288, now seen corresponding path program 94 times [2022-01-31 18:04:53,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:53,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523261459] [2022-01-31 18:04:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:53,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:53,663 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:53,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:53,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:56,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:56,464 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 18:04:56,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:56,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523261459] [2022-01-31 18:04:56,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [523261459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:56,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:56,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:04:56,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74146771] [2022-01-31 18:04:56,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:56,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:04:56,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:04:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:04:56,468 INFO L87 Difference]: Start difference. First operand 1536 states and 2108 transitions. Second operand has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:04,016 INFO L93 Difference]: Finished difference Result 2904 states and 4062 transitions. [2022-01-31 18:05:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:05:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1155 [2022-01-31 18:05:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:04,018 INFO L225 Difference]: With dead ends: 2904 [2022-01-31 18:05:04,018 INFO L226 Difference]: Without dead ends: 1565 [2022-01-31 18:05:04,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:05:04,021 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6172 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6172 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:04,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6172 Valid, 58 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:05:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-01-31 18:05:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1552. [2022-01-31 18:05:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1547 states have (on average 1.374272786037492) internal successors, (2126), 1547 states have internal predecessors, (2126), 3 states have call successors, (3), 3 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 18:05:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2130 transitions. [2022-01-31 18:05:04,828 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2130 transitions. Word has length 1155 [2022-01-31 18:05:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:04,828 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 2130 transitions. [2022-01-31 18:05:04,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2130 transitions. [2022-01-31 18:05:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1168 [2022-01-31 18:05:04,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:04,834 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:04,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:05:04,835 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1451846767, now seen corresponding path program 95 times [2022-01-31 18:05:04,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:04,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973680875] [2022-01-31 18:05:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:04,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:04,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:04,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:04,847 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:08,040 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 18:05:08,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:08,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973680875] [2022-01-31 18:05:08,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [973680875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:08,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:08,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:05:08,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368524138] [2022-01-31 18:05:08,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:08,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:05:08,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:08,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:05:08,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:05:08,043 INFO L87 Difference]: Start difference. First operand 1552 states and 2130 transitions. Second operand has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 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 18:05:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:16,627 INFO L93 Difference]: Finished difference Result 2934 states and 4104 transitions. [2022-01-31 18:05:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:05:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1167 [2022-01-31 18:05:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:16,629 INFO L225 Difference]: With dead ends: 2934 [2022-01-31 18:05:16,629 INFO L226 Difference]: Without dead ends: 1581 [2022-01-31 18:05:16,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:05:16,632 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6603 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6603 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:16,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6603 Valid, 38 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:05:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-01-31 18:05:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1568. [2022-01-31 18:05:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1563 states have (on average 1.3742802303262955) internal successors, (2148), 1563 states have internal predecessors, (2148), 3 states have call successors, (3), 3 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 18:05:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2152 transitions. [2022-01-31 18:05:17,472 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2152 transitions. Word has length 1167 [2022-01-31 18:05:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:17,472 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 2152 transitions. [2022-01-31 18:05:17,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 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 18:05:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2152 transitions. [2022-01-31 18:05:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2022-01-31 18:05:17,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:17,479 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:17,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:05:17,479 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1379072972, now seen corresponding path program 96 times [2022-01-31 18:05:17,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:17,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417501577] [2022-01-31 18:05:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:17,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:17,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:17,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:17,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:20,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:20,877 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 18:05:20,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:20,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417501577] [2022-01-31 18:05:20,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [417501577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:20,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:20,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:05:20,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018551628] [2022-01-31 18:05:20,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:20,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:05:20,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:05:20,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:05:20,880 INFO L87 Difference]: Start difference. First operand 1568 states and 2152 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (3), 3 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 18:05:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:30,043 INFO L93 Difference]: Finished difference Result 2964 states and 4146 transitions. [2022-01-31 18:05:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:05:30,044 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1179 [2022-01-31 18:05:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:30,045 INFO L225 Difference]: With dead ends: 2964 [2022-01-31 18:05:30,045 INFO L226 Difference]: Without dead ends: 1597 [2022-01-31 18:05:30,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:05:30,048 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6358 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 1051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6358 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:30,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6358 Valid, 48 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1051 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:05:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-01-31 18:05:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1584. [2022-01-31 18:05:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1579 states have (on average 1.3742875237492083) internal successors, (2170), 1579 states have internal predecessors, (2170), 3 states have call successors, (3), 3 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 18:05:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2174 transitions. [2022-01-31 18:05:31,061 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2174 transitions. Word has length 1179 [2022-01-31 18:05:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:31,061 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 2174 transitions. [2022-01-31 18:05:31,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (3), 3 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 18:05:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2174 transitions. [2022-01-31 18:05:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1192 [2022-01-31 18:05:31,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:31,067 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:31,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:05:31,067 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2143576237, now seen corresponding path program 97 times [2022-01-31 18:05:31,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:31,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614421401] [2022-01-31 18:05:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:31,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:31,069 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:31,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:31,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:34,280 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 18:05:34,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:34,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614421401] [2022-01-31 18:05:34,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614421401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:34,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:34,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:05:34,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114679590] [2022-01-31 18:05:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:34,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:05:34,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:34,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:05:34,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:05:34,282 INFO L87 Difference]: Start difference. First operand 1584 states and 2174 transitions. Second operand has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:42,134 INFO L93 Difference]: Finished difference Result 2994 states and 4188 transitions. [2022-01-31 18:05:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:05:42,134 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1191 [2022-01-31 18:05:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:42,136 INFO L225 Difference]: With dead ends: 2994 [2022-01-31 18:05:42,136 INFO L226 Difference]: Without dead ends: 1613 [2022-01-31 18:05:42,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:05:42,138 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6035 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6035 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:42,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6035 Valid, 63 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:05:42,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2022-01-31 18:05:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1600. [2022-01-31 18:05:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1595 states have (on average 1.374294670846395) internal successors, (2192), 1595 states have internal predecessors, (2192), 3 states have call successors, (3), 3 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 18:05:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2196 transitions. [2022-01-31 18:05:43,006 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2196 transitions. Word has length 1191 [2022-01-31 18:05:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:43,006 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2196 transitions. [2022-01-31 18:05:43,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2196 transitions. [2022-01-31 18:05:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1204 [2022-01-31 18:05:43,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:43,013 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:43,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:05:43,013 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash 739384616, now seen corresponding path program 98 times [2022-01-31 18:05:43,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:43,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705290148] [2022-01-31 18:05:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:43,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:43,017 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:43,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:43,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:46,371 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 18:05:46,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705290148] [2022-01-31 18:05:46,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1705290148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:46,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:46,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:05:46,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719302687] [2022-01-31 18:05:46,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:46,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:05:46,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:05:46,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:05:46,375 INFO L87 Difference]: Start difference. First operand 1600 states and 2196 transitions. Second operand has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 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 18:05:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:54,543 INFO L93 Difference]: Finished difference Result 3024 states and 4230 transitions. [2022-01-31 18:05:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:05:54,549 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1203 [2022-01-31 18:05:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:54,551 INFO L225 Difference]: With dead ends: 3024 [2022-01-31 18:05:54,551 INFO L226 Difference]: Without dead ends: 1629 [2022-01-31 18:05:54,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:05:54,554 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6869 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6869 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:54,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6869 Valid, 48 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:05:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-01-31 18:05:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1616. [2022-01-31 18:05:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1611 states have (on average 1.3743016759776536) internal successors, (2214), 1611 states have internal predecessors, (2214), 3 states have call successors, (3), 3 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 18:05:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2218 transitions. [2022-01-31 18:05:55,415 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2218 transitions. Word has length 1203 [2022-01-31 18:05:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:55,415 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 2218 transitions. [2022-01-31 18:05:55,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 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 18:05:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2218 transitions. [2022-01-31 18:05:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1216 [2022-01-31 18:05:55,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:55,421 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:55,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:05:55,421 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:55,422 INFO L85 PathProgramCache]: Analyzing trace with hash -802972727, now seen corresponding path program 99 times [2022-01-31 18:05:55,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:55,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670233565] [2022-01-31 18:05:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:55,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:55,424 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:55,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:55,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:59,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:59,029 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 18:05:59,029 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:59,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670233565] [2022-01-31 18:05:59,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670233565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:59,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:59,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:05:59,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501252015] [2022-01-31 18:05:59,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:59,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:05:59,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:05:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:05:59,032 INFO L87 Difference]: Start difference. First operand 1616 states and 2218 transitions. Second operand has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (3), 3 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 18:06:08,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:08,550 INFO L93 Difference]: Finished difference Result 3054 states and 4272 transitions. [2022-01-31 18:06:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:06:08,550 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1215 [2022-01-31 18:06:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:08,552 INFO L225 Difference]: With dead ends: 3054 [2022-01-31 18:06:08,552 INFO L226 Difference]: Without dead ends: 1645 [2022-01-31 18:06:08,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:06:08,555 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6910 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 1140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6910 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1140 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:08,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6910 Valid, 43 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1140 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:06:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-01-31 18:06:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1632. [2022-01-31 18:06:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1627 states have (on average 1.3743085433312845) internal successors, (2236), 1627 states have internal predecessors, (2236), 3 states have call successors, (3), 3 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 18:06:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2240 transitions. [2022-01-31 18:06:09,443 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2240 transitions. Word has length 1215 [2022-01-31 18:06:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:09,443 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 2240 transitions. [2022-01-31 18:06:09,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (3), 3 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 18:06:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2240 transitions. [2022-01-31 18:06:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1228 [2022-01-31 18:06:09,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:09,450 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:09,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:06:09,450 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1809580924, now seen corresponding path program 100 times [2022-01-31 18:06:09,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:09,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134642619] [2022-01-31 18:06:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:09,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:09,452 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:09,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:09,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:12,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:12,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:12,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134642619] [2022-01-31 18:06:12,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134642619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:12,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:12,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:06:12,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026939513] [2022-01-31 18:06:12,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:12,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:06:12,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:12,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:06:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:06:12,457 INFO L87 Difference]: Start difference. First operand 1632 states and 2240 transitions. Second operand has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:21,398 INFO L93 Difference]: Finished difference Result 3084 states and 4314 transitions. [2022-01-31 18:06:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:06:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1227 [2022-01-31 18:06:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:21,400 INFO L225 Difference]: With dead ends: 3084 [2022-01-31 18:06:21,400 INFO L226 Difference]: Without dead ends: 1661 [2022-01-31 18:06:21,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:06:21,402 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6249 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 1036 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6249 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1036 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:21,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6249 Valid, 63 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1036 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:06:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-31 18:06:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1648. [2022-01-31 18:06:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1643 states have (on average 1.3743152769324407) internal successors, (2258), 1643 states have internal predecessors, (2258), 3 states have call successors, (3), 3 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 18:06:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2262 transitions. [2022-01-31 18:06:22,332 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2262 transitions. Word has length 1227 [2022-01-31 18:06:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:22,332 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 2262 transitions. [2022-01-31 18:06:22,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2262 transitions. [2022-01-31 18:06:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2022-01-31 18:06:22,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:22,339 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:22,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:06:22,339 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:22,339 INFO L85 PathProgramCache]: Analyzing trace with hash 48186597, now seen corresponding path program 101 times [2022-01-31 18:06:22,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:22,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238325218] [2022-01-31 18:06:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:22,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:22,341 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:22,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:22,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:25,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:25,801 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 18:06:25,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:25,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238325218] [2022-01-31 18:06:25,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [238325218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:25,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:25,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:06:25,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668107175] [2022-01-31 18:06:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:25,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:06:25,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:25,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:06:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:06:25,804 INFO L87 Difference]: Start difference. First operand 1648 states and 2262 transitions. Second operand has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 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 18:06:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:35,697 INFO L93 Difference]: Finished difference Result 3114 states and 4356 transitions. [2022-01-31 18:06:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:06:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1239 [2022-01-31 18:06:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:35,699 INFO L225 Difference]: With dead ends: 3114 [2022-01-31 18:06:35,699 INFO L226 Difference]: Without dead ends: 1677 [2022-01-31 18:06:35,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:06:35,702 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6797 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 1122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6797 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1122 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:35,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6797 Valid, 38 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1122 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:06:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-01-31 18:06:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1664. [2022-01-31 18:06:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1659 states have (on average 1.3743218806509945) internal successors, (2280), 1659 states have internal predecessors, (2280), 3 states have call successors, (3), 3 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 18:06:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2284 transitions. [2022-01-31 18:06:36,685 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2284 transitions. Word has length 1239 [2022-01-31 18:06:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:36,685 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 2284 transitions. [2022-01-31 18:06:36,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 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 18:06:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2284 transitions. [2022-01-31 18:06:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1252 [2022-01-31 18:06:36,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:36,691 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:36,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:06:36,692 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:36,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1715968480, now seen corresponding path program 102 times [2022-01-31 18:06:36,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:36,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950962089] [2022-01-31 18:06:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:36,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:36,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:36,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:36,704 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:39,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:39,799 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 18:06:39,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:39,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950962089] [2022-01-31 18:06:39,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950962089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:39,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:39,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:06:39,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284127299] [2022-01-31 18:06:39,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:39,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:06:39,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:39,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:06:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:06:39,802 INFO L87 Difference]: Start difference. First operand 1664 states and 2284 transitions. Second operand has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (3), 3 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 18:06:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:49,457 INFO L93 Difference]: Finished difference Result 3144 states and 4398 transitions. [2022-01-31 18:06:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:06:49,458 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1251 [2022-01-31 18:06:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:49,459 INFO L225 Difference]: With dead ends: 3144 [2022-01-31 18:06:49,459 INFO L226 Difference]: Without dead ends: 1693 [2022-01-31 18:06:49,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:06:49,462 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6643 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6643 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:49,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6643 Valid, 58 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:06:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2022-01-31 18:06:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1680. [2022-01-31 18:06:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1675 states have (on average 1.3743283582089552) internal successors, (2302), 1675 states have internal predecessors, (2302), 3 states have call successors, (3), 3 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 18:06:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2306 transitions. [2022-01-31 18:06:50,507 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2306 transitions. Word has length 1251 [2022-01-31 18:06:50,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:50,507 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2306 transitions. [2022-01-31 18:06:50,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (3), 3 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 18:06:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2306 transitions. [2022-01-31 18:06:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2022-01-31 18:06:50,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:50,514 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:50,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:06:50,514 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:50,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1723704319, now seen corresponding path program 103 times [2022-01-31 18:06:50,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:50,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332706138] [2022-01-31 18:06:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:50,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:50,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:50,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:50,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:53,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:53,339 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 18:06:53,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:53,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332706138] [2022-01-31 18:06:53,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1332706138] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:53,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:53,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:06:53,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199758010] [2022-01-31 18:06:53,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:53,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:06:53,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:53,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:06:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:06:53,343 INFO L87 Difference]: Start difference. First operand 1680 states and 2306 transitions. Second operand has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:04,051 INFO L93 Difference]: Finished difference Result 3174 states and 4440 transitions. [2022-01-31 18:07:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:07:04,051 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1263 [2022-01-31 18:07:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:04,053 INFO L225 Difference]: With dead ends: 3174 [2022-01-31 18:07:04,053 INFO L226 Difference]: Without dead ends: 1709 [2022-01-31 18:07:04,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 18:07:04,056 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7906 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 1293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7906 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1293 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:04,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7906 Valid, 38 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1293 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:07:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-01-31 18:07:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1696. [2022-01-31 18:07:05,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1691 states have (on average 1.374334713187463) internal successors, (2324), 1691 states have internal predecessors, (2324), 3 states have call successors, (3), 3 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 18:07:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2328 transitions. [2022-01-31 18:07:05,063 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2328 transitions. Word has length 1263 [2022-01-31 18:07:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:05,063 INFO L470 AbstractCegarLoop]: Abstraction has 1696 states and 2328 transitions. [2022-01-31 18:07:05,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2328 transitions. [2022-01-31 18:07:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1276 [2022-01-31 18:07:05,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:05,070 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:05,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:07:05,070 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash -195300036, now seen corresponding path program 104 times [2022-01-31 18:07:05,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:05,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785676349] [2022-01-31 18:07:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:05,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:05,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:05,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:05,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:08,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:08,735 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 18:07:08,735 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:08,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785676349] [2022-01-31 18:07:08,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [785676349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:08,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:08,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:07:08,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322335963] [2022-01-31 18:07:08,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:08,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:07:08,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:07:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:07:08,739 INFO L87 Difference]: Start difference. First operand 1696 states and 2328 transitions. Second operand has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 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 18:07:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:18,800 INFO L93 Difference]: Finished difference Result 3204 states and 4482 transitions. [2022-01-31 18:07:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:07:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1275 [2022-01-31 18:07:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:18,802 INFO L225 Difference]: With dead ends: 3204 [2022-01-31 18:07:18,802 INFO L226 Difference]: Without dead ends: 1725 [2022-01-31 18:07:18,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 18:07:18,805 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6439 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 1068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6439 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:18,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6439 Valid, 48 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1068 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:07:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-01-31 18:07:19,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1712. [2022-01-31 18:07:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1707 states have (on average 1.374340949033392) internal successors, (2346), 1707 states have internal predecessors, (2346), 3 states have call successors, (3), 3 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 18:07:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2350 transitions. [2022-01-31 18:07:19,784 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2350 transitions. Word has length 1275 [2022-01-31 18:07:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:19,784 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 2350 transitions. [2022-01-31 18:07:19,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 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 18:07:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2350 transitions. [2022-01-31 18:07:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1288 [2022-01-31 18:07:19,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:19,791 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:19,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:07:19,791 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:19,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash -845684451, now seen corresponding path program 105 times [2022-01-31 18:07:19,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:19,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002299402] [2022-01-31 18:07:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:19,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:19,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:19,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:19,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:22,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:22,817 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 18:07:22,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:22,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002299402] [2022-01-31 18:07:22,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002299402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:22,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:22,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:07:22,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28277196] [2022-01-31 18:07:22,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:22,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:07:22,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:07:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:07:22,819 INFO L87 Difference]: Start difference. First operand 1712 states and 2350 transitions. Second operand has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (3), 3 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 18:07:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:32,125 INFO L93 Difference]: Finished difference Result 3234 states and 4524 transitions. [2022-01-31 18:07:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:07:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1287 [2022-01-31 18:07:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:32,127 INFO L225 Difference]: With dead ends: 3234 [2022-01-31 18:07:32,127 INFO L226 Difference]: Without dead ends: 1741 [2022-01-31 18:07:32,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 18:07:32,130 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6181 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 1031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6181 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1031 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:32,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6181 Valid, 58 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1031 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:07:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-01-31 18:07:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1728. [2022-01-31 18:07:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1723 states have (on average 1.3743470690655832) internal successors, (2368), 1723 states have internal predecessors, (2368), 3 states have call successors, (3), 3 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 18:07:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2372 transitions. [2022-01-31 18:07:33,109 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2372 transitions. Word has length 1287 [2022-01-31 18:07:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:33,109 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2372 transitions. [2022-01-31 18:07:33,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (3), 3 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 18:07:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2372 transitions. [2022-01-31 18:07:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1300 [2022-01-31 18:07:33,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:33,117 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:33,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:07:33,117 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash -432009576, now seen corresponding path program 106 times [2022-01-31 18:07:33,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:33,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486141760] [2022-01-31 18:07:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:33,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:33,119 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:33,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:33,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:37,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:37,130 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 18:07:37,130 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:37,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486141760] [2022-01-31 18:07:37,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486141760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:37,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:37,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:07:37,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081097388] [2022-01-31 18:07:37,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:37,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:07:37,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:37,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:07:37,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:07:37,134 INFO L87 Difference]: Start difference. First operand 1728 states and 2372 transitions. Second operand has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:47,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:47,976 INFO L93 Difference]: Finished difference Result 3264 states and 4566 transitions. [2022-01-31 18:07:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:07:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1299 [2022-01-31 18:07:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:47,978 INFO L225 Difference]: With dead ends: 3264 [2022-01-31 18:07:47,978 INFO L226 Difference]: Without dead ends: 1757 [2022-01-31 18:07:47,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 18:07:47,981 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9589 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 1553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9589 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1553 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:47,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9589 Valid, 43 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1553 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:07:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2022-01-31 18:07:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1744. [2022-01-31 18:07:49,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1739 states have (on average 1.3743530764807361) internal successors, (2390), 1739 states have internal predecessors, (2390), 3 states have call successors, (3), 3 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 18:07:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2394 transitions. [2022-01-31 18:07:49,035 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2394 transitions. Word has length 1299 [2022-01-31 18:07:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:49,035 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 2394 transitions. [2022-01-31 18:07:49,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2394 transitions. [2022-01-31 18:07:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1312 [2022-01-31 18:07:49,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:49,043 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:49,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:07:49,043 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash 858444857, now seen corresponding path program 107 times [2022-01-31 18:07:49,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:49,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669229016] [2022-01-31 18:07:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:49,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:49,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:49,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:49,057 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:53,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:53,138 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 18:07:53,139 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:53,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669229016] [2022-01-31 18:07:53,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [669229016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:53,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:53,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:07:53,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771837246] [2022-01-31 18:07:53,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:53,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:07:53,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:07:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:07:53,141 INFO L87 Difference]: Start difference. First operand 1744 states and 2394 transitions. Second operand has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 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 18:08:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:07,706 INFO L93 Difference]: Finished difference Result 3294 states and 4608 transitions. [2022-01-31 18:08:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:08:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1311 [2022-01-31 18:08:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:07,709 INFO L225 Difference]: With dead ends: 3294 [2022-01-31 18:08:07,709 INFO L226 Difference]: Without dead ends: 1773 [2022-01-31 18:08:07,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 18:08:07,713 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7927 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 1300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7927 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1300 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:07,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7927 Valid, 38 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1300 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:08:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-01-31 18:08:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1760. [2022-01-31 18:08:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1755 states have (on average 1.3743589743589744) internal successors, (2412), 1755 states have internal predecessors, (2412), 3 states have call successors, (3), 3 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 18:08:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 2416 transitions. [2022-01-31 18:08:09,138 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 2416 transitions. Word has length 1311 [2022-01-31 18:08:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:09,139 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 2416 transitions. [2022-01-31 18:08:09,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 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 18:08:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 2416 transitions. [2022-01-31 18:08:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2022-01-31 18:08:09,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:09,149 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:09,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:08:09,149 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash 433251828, now seen corresponding path program 108 times [2022-01-31 18:08:09,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:09,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704585235] [2022-01-31 18:08:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:09,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:09,151 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:09,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:09,166 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:13,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:13,410 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 18:08:13,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:13,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704585235] [2022-01-31 18:08:13,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [704585235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:13,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:13,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:08:13,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185449134] [2022-01-31 18:08:13,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:13,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:08:13,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:13,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:08:13,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:08:13,414 INFO L87 Difference]: Start difference. First operand 1760 states and 2416 transitions. Second operand has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (3), 3 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 18:08:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:24,725 INFO L93 Difference]: Finished difference Result 3324 states and 4650 transitions. [2022-01-31 18:08:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:08:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1323 [2022-01-31 18:08:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:24,727 INFO L225 Difference]: With dead ends: 3324 [2022-01-31 18:08:24,727 INFO L226 Difference]: Without dead ends: 1789 [2022-01-31 18:08:24,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 18:08:24,730 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8969 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8969 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:24,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8969 Valid, 48 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:08:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-01-31 18:08:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1776. [2022-01-31 18:08:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1771 states have (on average 1.3743647656691136) internal successors, (2434), 1771 states have internal predecessors, (2434), 3 states have call successors, (3), 3 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 18:08:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2438 transitions. [2022-01-31 18:08:25,774 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2438 transitions. Word has length 1323 [2022-01-31 18:08:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:25,774 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 2438 transitions. [2022-01-31 18:08:25,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (3), 3 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 18:08:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2438 transitions. [2022-01-31 18:08:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2022-01-31 18:08:25,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:25,798 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:25,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:08:25,798 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1447441749, now seen corresponding path program 109 times [2022-01-31 18:08:25,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:25,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335150397] [2022-01-31 18:08:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:25,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:25,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:25,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:25,814 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:28,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:28,965 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 18:08:28,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:28,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335150397] [2022-01-31 18:08:28,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [335150397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:28,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:28,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:08:28,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581168481] [2022-01-31 18:08:28,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:28,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:08:28,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:08:28,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:08:28,969 INFO L87 Difference]: Start difference. First operand 1776 states and 2438 transitions. Second operand has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 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 18:08:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:40,611 INFO L93 Difference]: Finished difference Result 3354 states and 4692 transitions. [2022-01-31 18:08:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:08:40,611 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1335 [2022-01-31 18:08:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:40,613 INFO L225 Difference]: With dead ends: 3354 [2022-01-31 18:08:40,613 INFO L226 Difference]: Without dead ends: 1805 [2022-01-31 18:08:40,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 18:08:40,617 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7463 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 1231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7463 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1231 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:40,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7463 Valid, 63 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1231 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:08:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-01-31 18:08:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1792. [2022-01-31 18:08:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1787 states have (on average 1.374370453273643) internal successors, (2456), 1787 states have internal predecessors, (2456), 3 states have call successors, (3), 3 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 18:08:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2460 transitions. [2022-01-31 18:08:41,728 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2460 transitions. Word has length 1335 [2022-01-31 18:08:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:41,728 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2460 transitions. [2022-01-31 18:08:41,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 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 18:08:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2460 transitions. [2022-01-31 18:08:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2022-01-31 18:08:41,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:41,736 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:41,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 18:08:41,736 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2097972400, now seen corresponding path program 110 times [2022-01-31 18:08:41,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601294649] [2022-01-31 18:08:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:41,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:41,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:41,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:41,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:45,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:45,703 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 18:08:45,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601294649] [2022-01-31 18:08:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601294649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:45,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:45,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:08:45,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681686103] [2022-01-31 18:08:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:45,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:08:45,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:08:45,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:08:45,706 INFO L87 Difference]: Start difference. First operand 1792 states and 2460 transitions. Second operand has 115 states, 115 states have (on average 2.1130434782608694) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (3), 3 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 18:08:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:57,068 INFO L93 Difference]: Finished difference Result 3384 states and 4734 transitions. [2022-01-31 18:08:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 18:08:57,068 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.1130434782608694) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1347 [2022-01-31 18:08:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:57,070 INFO L225 Difference]: With dead ends: 3384 [2022-01-31 18:08:57,070 INFO L226 Difference]: Without dead ends: 1821 [2022-01-31 18:08:57,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 18:08:57,080 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7556 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 1246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7556 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1246 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:57,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7556 Valid, 68 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1246 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:08:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2022-01-31 18:08:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1808. [2022-01-31 18:08:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1803 states have (on average 1.3743760399334441) internal successors, (2478), 1803 states have internal predecessors, (2478), 3 states have call successors, (3), 3 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 18:08:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2482 transitions. [2022-01-31 18:08:58,198 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2482 transitions. Word has length 1347 [2022-01-31 18:08:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:58,199 INFO L470 AbstractCegarLoop]: Abstraction has 1808 states and 2482 transitions. [2022-01-31 18:08:58,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.1130434782608694) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (3), 3 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 18:08:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2482 transitions. [2022-01-31 18:08:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2022-01-31 18:08:58,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:58,207 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:58,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 18:08:58,207 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:58,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1546978417, now seen corresponding path program 111 times [2022-01-31 18:08:58,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:58,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082068187] [2022-01-31 18:08:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:58,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:58,208 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:58,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:58,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:02,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:02,589 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 18:09:02,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:02,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082068187] [2022-01-31 18:09:02,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082068187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:02,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:02,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 18:09:02,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660273822] [2022-01-31 18:09:02,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:02,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 18:09:02,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:02,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 18:09:02,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:09:02,592 INFO L87 Difference]: Start difference. First operand 1808 states and 2482 transitions. Second operand has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (3), 3 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 18:09:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:14,981 INFO L93 Difference]: Finished difference Result 3414 states and 4776 transitions. [2022-01-31 18:09:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 18:09:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1359 [2022-01-31 18:09:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:14,983 INFO L225 Difference]: With dead ends: 3414 [2022-01-31 18:09:14,983 INFO L226 Difference]: Without dead ends: 1837 [2022-01-31 18:09:14,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 18:09:14,986 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6960 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6960 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:14,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6960 Valid, 53 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:09:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2022-01-31 18:09:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1824. [2022-01-31 18:09:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1819 states have (on average 1.3743815283122596) internal successors, (2500), 1819 states have internal predecessors, (2500), 3 states have call successors, (3), 3 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 18:09:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2504 transitions. [2022-01-31 18:09:16,106 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2504 transitions. Word has length 1359 [2022-01-31 18:09:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:16,107 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 2504 transitions. [2022-01-31 18:09:16,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (3), 3 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 18:09:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2504 transitions. [2022-01-31 18:09:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2022-01-31 18:09:16,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:16,115 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:16,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 18:09:16,115 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash 192990892, now seen corresponding path program 112 times [2022-01-31 18:09:16,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:16,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868678708] [2022-01-31 18:09:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:16,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:16,118 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:16,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:16,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:20,463 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 18:09:20,463 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:20,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868678708] [2022-01-31 18:09:20,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [868678708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:20,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:20,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 18:09:20,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421616902] [2022-01-31 18:09:20,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:20,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 18:09:20,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 18:09:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:09:20,467 INFO L87 Difference]: Start difference. First operand 1824 states and 2504 transitions. Second operand has 117 states, 117 states have (on average 2.111111111111111) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (3), 3 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 18:09:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:31,801 INFO L93 Difference]: Finished difference Result 3444 states and 4818 transitions. [2022-01-31 18:09:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 18:09:31,801 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.111111111111111) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1371 [2022-01-31 18:09:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:31,803 INFO L225 Difference]: With dead ends: 3444 [2022-01-31 18:09:31,803 INFO L226 Difference]: Without dead ends: 1853 [2022-01-31 18:09:31,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 18:09:31,807 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8028 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 1317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8028 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1317 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:31,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8028 Valid, 48 Invalid, 3302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1317 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:09:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2022-01-31 18:09:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1840. [2022-01-31 18:09:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1835 states have (on average 1.3743869209809265) internal successors, (2522), 1835 states have internal predecessors, (2522), 3 states have call successors, (3), 3 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 18:09:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2526 transitions. [2022-01-31 18:09:33,125 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2526 transitions. Word has length 1371 [2022-01-31 18:09:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:33,125 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 2526 transitions. [2022-01-31 18:09:33,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.111111111111111) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (3), 3 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 18:09:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2526 transitions. [2022-01-31 18:09:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1384 [2022-01-31 18:09:33,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:33,133 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:33,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 18:09:33,133 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:33,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1555938931, now seen corresponding path program 113 times [2022-01-31 18:09:33,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:33,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760214412] [2022-01-31 18:09:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:33,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:33,135 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:33,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:33,148 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:37,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:37,334 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 18:09:37,334 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760214412] [2022-01-31 18:09:37,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760214412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:37,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:37,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 18:09:37,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735812161] [2022-01-31 18:09:37,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:37,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 18:09:37,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 18:09:37,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:09:37,338 INFO L87 Difference]: Start difference. First operand 1840 states and 2526 transitions. Second operand has 118 states, 118 states have (on average 2.110169491525424) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (3), 3 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 18:09:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:49,940 INFO L93 Difference]: Finished difference Result 3474 states and 4860 transitions. [2022-01-31 18:09:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 18:09:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.110169491525424) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1383 [2022-01-31 18:09:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:49,942 INFO L225 Difference]: With dead ends: 3474 [2022-01-31 18:09:49,942 INFO L226 Difference]: Without dead ends: 1869 [2022-01-31 18:09:49,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 18:09:49,945 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7692 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 1269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7692 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1269 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:49,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7692 Valid, 48 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1269 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:09:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-01-31 18:09:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1856. [2022-01-31 18:09:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1851 states have (on average 1.3743922204213939) internal successors, (2544), 1851 states have internal predecessors, (2544), 3 states have call successors, (3), 3 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 18:09:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2548 transitions. [2022-01-31 18:09:51,342 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2548 transitions. Word has length 1383 [2022-01-31 18:09:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:51,342 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 2548 transitions. [2022-01-31 18:09:51,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.110169491525424) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (3), 3 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 18:09:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2548 transitions. [2022-01-31 18:09:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1396 [2022-01-31 18:09:51,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:51,350 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:51,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 18:09:51,350 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:51,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1935269896, now seen corresponding path program 114 times [2022-01-31 18:09:51,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:51,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263638225] [2022-01-31 18:09:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:51,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:51,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:51,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:51,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:54,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:54,808 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 18:09:54,808 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:54,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263638225] [2022-01-31 18:09:54,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [263638225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:54,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:54,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 18:09:54,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950063521] [2022-01-31 18:09:54,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:54,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 18:09:54,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:54,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 18:09:54,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:09:54,812 INFO L87 Difference]: Start difference. First operand 1856 states and 2548 transitions. Second operand has 119 states, 119 states have (on average 2.1092436974789917) internal successors, (251), 118 states have internal predecessors, (251), 2 states have call successors, (3), 3 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 18:10:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:07,039 INFO L93 Difference]: Finished difference Result 3504 states and 4902 transitions. [2022-01-31 18:10:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 18:10:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.1092436974789917) internal successors, (251), 118 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1395 [2022-01-31 18:10:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:07,042 INFO L225 Difference]: With dead ends: 3504 [2022-01-31 18:10:07,042 INFO L226 Difference]: Without dead ends: 1885 [2022-01-31 18:10:07,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 18:10:07,045 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8305 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 1362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8305 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1362 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:07,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8305 Valid, 78 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1362 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:10:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2022-01-31 18:10:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1872. [2022-01-31 18:10:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1867 states have (on average 1.3743974290305303) internal successors, (2566), 1867 states have internal predecessors, (2566), 3 states have call successors, (3), 3 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 18:10:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2570 transitions. [2022-01-31 18:10:08,240 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2570 transitions. Word has length 1395 [2022-01-31 18:10:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:08,241 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 2570 transitions. [2022-01-31 18:10:08,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.1092436974789917) internal successors, (251), 118 states have internal predecessors, (251), 2 states have call successors, (3), 3 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 18:10:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2570 transitions. [2022-01-31 18:10:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1408 [2022-01-31 18:10:08,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:08,249 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:08,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 18:10:08,249 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:08,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:08,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1656286377, now seen corresponding path program 115 times [2022-01-31 18:10:08,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:08,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624558518] [2022-01-31 18:10:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:08,251 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:08,251 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:08,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:08,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:12,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:12,408 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 18:10:12,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624558518] [2022-01-31 18:10:12,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624558518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:12,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:12,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 18:10:12,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471299868] [2022-01-31 18:10:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:12,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 18:10:12,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:12,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 18:10:12,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:10:12,413 INFO L87 Difference]: Start difference. First operand 1872 states and 2570 transitions. Second operand has 120 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 119 states have internal predecessors, (253), 2 states have call successors, (3), 3 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 18:10:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:25,159 INFO L93 Difference]: Finished difference Result 3534 states and 4944 transitions. [2022-01-31 18:10:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 18:10:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 119 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1407 [2022-01-31 18:10:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:25,162 INFO L225 Difference]: With dead ends: 3534 [2022-01-31 18:10:25,162 INFO L226 Difference]: Without dead ends: 1901 [2022-01-31 18:10:25,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 18:10:25,166 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11180 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 1804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11180 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 3819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1804 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:25,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11180 Valid, 33 Invalid, 3819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1804 Valid, 2015 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:10:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-01-31 18:10:26,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1888. [2022-01-31 18:10:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1883 states have (on average 1.3744025491237386) internal successors, (2588), 1883 states have internal predecessors, (2588), 3 states have call successors, (3), 3 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 18:10:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2592 transitions. [2022-01-31 18:10:26,824 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2592 transitions. Word has length 1407 [2022-01-31 18:10:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:26,824 INFO L470 AbstractCegarLoop]: Abstraction has 1888 states and 2592 transitions. [2022-01-31 18:10:26,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 119 states have internal predecessors, (253), 2 states have call successors, (3), 3 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 18:10:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2592 transitions. [2022-01-31 18:10:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1420 [2022-01-31 18:10:26,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:26,836 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:26,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 18:10:26,836 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:26,836 INFO L85 PathProgramCache]: Analyzing trace with hash 811446116, now seen corresponding path program 116 times [2022-01-31 18:10:26,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:26,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136951787] [2022-01-31 18:10:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:26,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:26,838 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:26,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:26,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:31,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:31,497 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 18:10:31,497 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:31,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136951787] [2022-01-31 18:10:31,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136951787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:31,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:31,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 18:10:31,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744851575] [2022-01-31 18:10:31,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:31,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 18:10:31,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 18:10:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:10:31,500 INFO L87 Difference]: Start difference. First operand 1888 states and 2592 transitions. Second operand has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 2 states have call successors, (3), 3 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 18:10:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:10:46,058 INFO L93 Difference]: Finished difference Result 3564 states and 4986 transitions. [2022-01-31 18:10:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 18:10:46,058 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1419 [2022-01-31 18:10:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:10:46,061 INFO L225 Difference]: With dead ends: 3564 [2022-01-31 18:10:46,061 INFO L226 Difference]: Without dead ends: 1917 [2022-01-31 18:10:46,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 18:10:46,064 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8569 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 1409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8569 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1409 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:10:46,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8569 Valid, 53 Invalid, 3469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1409 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:10:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-01-31 18:10:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1904. [2022-01-31 18:10:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1899 states have (on average 1.3744075829383886) internal successors, (2610), 1899 states have internal predecessors, (2610), 3 states have call successors, (3), 3 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 18:10:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 2614 transitions. [2022-01-31 18:10:47,362 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 2614 transitions. Word has length 1419 [2022-01-31 18:10:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:10:47,362 INFO L470 AbstractCegarLoop]: Abstraction has 1904 states and 2614 transitions. [2022-01-31 18:10:47,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 2 states have call successors, (3), 3 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 18:10:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 2614 transitions. [2022-01-31 18:10:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1432 [2022-01-31 18:10:47,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:10:47,371 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:10:47,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 18:10:47,371 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:10:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:10:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1256457669, now seen corresponding path program 117 times [2022-01-31 18:10:47,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:10:47,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819127058] [2022-01-31 18:10:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:10:47,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:10:47,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:10:47,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:10:47,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:10:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:52,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:10:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:10:52,682 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 18:10:52,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:10:52,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819127058] [2022-01-31 18:10:52,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [819127058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:10:52,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:10:52,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 18:10:52,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076702787] [2022-01-31 18:10:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:10:52,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 18:10:52,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:10:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 18:10:52,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:10:52,687 INFO L87 Difference]: Start difference. First operand 1904 states and 2614 transitions. Second operand has 122 states, 122 states have (on average 2.1065573770491803) internal successors, (257), 121 states have internal predecessors, (257), 2 states have call successors, (3), 3 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 18:11:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:06,727 INFO L93 Difference]: Finished difference Result 3594 states and 5028 transitions. [2022-01-31 18:11:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 18:11:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.1065573770491803) internal successors, (257), 121 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1431 [2022-01-31 18:11:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:06,731 INFO L225 Difference]: With dead ends: 3594 [2022-01-31 18:11:06,731 INFO L226 Difference]: Without dead ends: 1933 [2022-01-31 18:11:06,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 18:11:06,736 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9208 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 1503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9208 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1503 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:06,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9208 Valid, 48 Invalid, 3573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1503 Valid, 2070 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 18:11:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-01-31 18:11:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1920. [2022-01-31 18:11:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1915 states have (on average 1.3744125326370757) internal successors, (2632), 1915 states have internal predecessors, (2632), 3 states have call successors, (3), 3 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 18:11:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 2636 transitions. [2022-01-31 18:11:08,452 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 2636 transitions. Word has length 1431 [2022-01-31 18:11:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:08,452 INFO L470 AbstractCegarLoop]: Abstraction has 1920 states and 2636 transitions. [2022-01-31 18:11:08,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.1065573770491803) internal successors, (257), 121 states have internal predecessors, (257), 2 states have call successors, (3), 3 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 18:11:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 2636 transitions. [2022-01-31 18:11:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1444 [2022-01-31 18:11:08,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:08,465 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:08,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 18:11:08,465 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1315650752, now seen corresponding path program 118 times [2022-01-31 18:11:08,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941559738] [2022-01-31 18:11:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:08,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:08,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:08,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:08,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:14,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:14,285 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 18:11:14,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941559738] [2022-01-31 18:11:14,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [941559738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:14,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:14,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 18:11:14,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981460747] [2022-01-31 18:11:14,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:14,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 18:11:14,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 18:11:14,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:11:14,291 INFO L87 Difference]: Start difference. First operand 1920 states and 2636 transitions. Second operand has 123 states, 123 states have (on average 2.105691056910569) internal successors, (259), 122 states have internal predecessors, (259), 2 states have call successors, (3), 3 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 18:11:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:28,901 INFO L93 Difference]: Finished difference Result 3624 states and 5070 transitions. [2022-01-31 18:11:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 18:11:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.105691056910569) internal successors, (259), 122 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1443 [2022-01-31 18:11:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:28,903 INFO L225 Difference]: With dead ends: 3624 [2022-01-31 18:11:28,903 INFO L226 Difference]: Without dead ends: 1949 [2022-01-31 18:11:28,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 18:11:28,907 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8885 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 1457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8885 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1457 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:28,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8885 Valid, 43 Invalid, 3537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1457 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 18:11:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2022-01-31 18:11:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1936. [2022-01-31 18:11:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1931 states have (on average 1.37441740031072) internal successors, (2654), 1931 states have internal predecessors, (2654), 3 states have call successors, (3), 3 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 18:11:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2658 transitions. [2022-01-31 18:11:30,154 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2658 transitions. Word has length 1443 [2022-01-31 18:11:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:30,154 INFO L470 AbstractCegarLoop]: Abstraction has 1936 states and 2658 transitions. [2022-01-31 18:11:30,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.105691056910569) internal successors, (259), 122 states have internal predecessors, (259), 2 states have call successors, (3), 3 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 18:11:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2658 transitions. [2022-01-31 18:11:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1456 [2022-01-31 18:11:30,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:30,163 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:30,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 18:11:30,164 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash 621710561, now seen corresponding path program 119 times [2022-01-31 18:11:30,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:30,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089272135] [2022-01-31 18:11:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:30,165 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:30,165 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:30,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:30,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:34,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:34,498 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 18:11:34,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089272135] [2022-01-31 18:11:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089272135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:34,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:34,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 18:11:34,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869815873] [2022-01-31 18:11:34,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:34,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 18:11:34,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 18:11:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:11:34,502 INFO L87 Difference]: Start difference. First operand 1936 states and 2658 transitions. Second operand has 124 states, 124 states have (on average 2.1048387096774195) internal successors, (261), 123 states have internal predecessors, (261), 2 states have call successors, (3), 3 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 18:11:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:11:49,711 INFO L93 Difference]: Finished difference Result 3654 states and 5112 transitions. [2022-01-31 18:11:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 18:11:49,711 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.1048387096774195) internal successors, (261), 123 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1455 [2022-01-31 18:11:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:11:49,714 INFO L225 Difference]: With dead ends: 3654 [2022-01-31 18:11:49,714 INFO L226 Difference]: Without dead ends: 1965 [2022-01-31 18:11:49,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 18:11:49,717 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9420 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 1538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9420 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1538 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:11:49,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9420 Valid, 53 Invalid, 3649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1538 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 18:11:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-01-31 18:11:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1952. [2022-01-31 18:11:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1947 states have (on average 1.37442218798151) internal successors, (2676), 1947 states have internal predecessors, (2676), 3 states have call successors, (3), 3 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 18:11:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2680 transitions. [2022-01-31 18:11:51,078 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2680 transitions. Word has length 1455 [2022-01-31 18:11:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:11:51,078 INFO L470 AbstractCegarLoop]: Abstraction has 1952 states and 2680 transitions. [2022-01-31 18:11:51,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.1048387096774195) internal successors, (261), 123 states have internal predecessors, (261), 2 states have call successors, (3), 3 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 18:11:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2680 transitions. [2022-01-31 18:11:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1468 [2022-01-31 18:11:51,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:11:51,087 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:11:51,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 18:11:51,087 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:11:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:11:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1331791900, now seen corresponding path program 120 times [2022-01-31 18:11:51,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:11:51,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689273102] [2022-01-31 18:11:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:11:51,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:11:51,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:11:51,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:11:51,103 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:11:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:56,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:11:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:11:56,244 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 18:11:56,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:11:56,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689273102] [2022-01-31 18:11:56,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689273102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:11:56,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:11:56,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 18:11:56,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194228932] [2022-01-31 18:11:56,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:11:56,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 18:11:56,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:11:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 18:11:56,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:11:56,248 INFO L87 Difference]: Start difference. First operand 1952 states and 2680 transitions. Second operand has 125 states, 125 states have (on average 2.104) internal successors, (263), 124 states have internal predecessors, (263), 2 states have call successors, (3), 3 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 18:12:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:10,759 INFO L93 Difference]: Finished difference Result 3684 states and 5154 transitions. [2022-01-31 18:12:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 18:12:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.104) internal successors, (263), 124 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1467 [2022-01-31 18:12:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:10,761 INFO L225 Difference]: With dead ends: 3684 [2022-01-31 18:12:10,761 INFO L226 Difference]: Without dead ends: 1981 [2022-01-31 18:12:10,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 18:12:10,765 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8655 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 1419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8655 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1419 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:10,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8655 Valid, 48 Invalid, 3540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1419 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:12:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2022-01-31 18:12:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1968. [2022-01-31 18:12:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1963 states have (on average 1.3744268976057055) internal successors, (2698), 1963 states have internal predecessors, (2698), 3 states have call successors, (3), 3 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 18:12:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2702 transitions. [2022-01-31 18:12:12,114 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2702 transitions. Word has length 1467 [2022-01-31 18:12:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:12,114 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2702 transitions. [2022-01-31 18:12:12,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.104) internal successors, (263), 124 states have internal predecessors, (263), 2 states have call successors, (3), 3 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 18:12:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2702 transitions. [2022-01-31 18:12:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1480 [2022-01-31 18:12:12,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:12,123 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:12,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 18:12:12,123 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1937998333, now seen corresponding path program 121 times [2022-01-31 18:12:12,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:12,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892310552] [2022-01-31 18:12:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:12,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:12,125 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:12,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:12,139 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat