/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:41:14,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:41:14,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:41:14,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:41:14,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:41:14,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:41:14,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:41:14,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:41:14,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:41:14,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:41:14,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:41:14,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:41:14,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:41:14,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:41:14,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:41:14,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:41:14,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 21:41:14,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:41:14,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:41:14,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:41:14,467 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 21:41:14,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:41:14,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:41:14,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:41:14,482 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:41:14,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:41:14,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:41:14,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:41:14,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:41:14,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:41:14,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:41:14,483 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:41:14,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:41:14,483 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:41:14,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:41:14,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:41:14,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:41:14,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:41:14,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:41:14,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:41:14,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:41:14,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:41:14,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:41:14,484 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:41:14,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:41:14,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:41:14,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:41:14,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:41:14,652 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:41:14,653 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:41:14,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2022-01-31 21:41:14,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b407bb129/0c3c484088aa46c99f9acffe42a953a3/FLAGb242a84c6 [2022-01-31 21:41:15,074 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:41:15,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2022-01-31 21:41:15,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b407bb129/0c3c484088aa46c99f9acffe42a953a3/FLAGb242a84c6 [2022-01-31 21:41:15,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b407bb129/0c3c484088aa46c99f9acffe42a953a3 [2022-01-31 21:41:15,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:41:15,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:41:15,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:41:15,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:41:15,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:41:15,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d2f099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15, skipping insertion in model container [2022-01-31 21:41:15,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:41:15,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:41:15,250 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2022-01-31 21:41:15,252 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2022-01-31 21:41:15,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:41:15,272 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:41:15,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2022-01-31 21:41:15,286 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2022-01-31 21:41:15,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:41:15,295 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:41:15,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15 WrapperNode [2022-01-31 21:41:15,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:41:15,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:41:15,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:41:15,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:41:15,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:41:15,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:41:15,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:41:15,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:41:15,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (1/1) ... [2022-01-31 21:41:15,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:41:15,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:41:15,354 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 21:41:15,373 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 21:41:15,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:41:15,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:41:15,383 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:41:15,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:41:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:41:15,384 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:41:15,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:41:15,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2022-01-31 21:41:15,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:41:15,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:41:15,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:41:15,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:41:15,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:41:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:41:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:41:15,423 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:41:15,424 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:41:15,508 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:41:15,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:41:15,512 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 21:41:15,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:41:15 BoogieIcfgContainer [2022-01-31 21:41:15,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:41:15,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:41:15,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:41:15,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:41:15,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:41:15" (1/3) ... [2022-01-31 21:41:15,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1e1864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:41:15, skipping insertion in model container [2022-01-31 21:41:15,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:41:15" (2/3) ... [2022-01-31 21:41:15,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1e1864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:41:15, skipping insertion in model container [2022-01-31 21:41:15,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:41:15" (3/3) ... [2022-01-31 21:41:15,523 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2022-01-31 21:41:15,526 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:41:15,526 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-31 21:41:15,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:41:15,568 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 21:41:15,568 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-31 21:41:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 21:41:15,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-31 21:41:15,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:15,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:15,586 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:15,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1624254505, now seen corresponding path program 1 times [2022-01-31 21:41:15,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:15,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754576813] [2022-01-31 21:41:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:15,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:15,639 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:15,833 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 21:41:15,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754576813] [2022-01-31 21:41:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [754576813] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:15,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:15,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 21:41:15,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877323353] [2022-01-31 21:41:15,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:15,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 21:41:15,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 21:41:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 21:41:15,866 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:15,939 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-01-31 21:41:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 21:41:15,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-31 21:41:15,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:15,947 INFO L225 Difference]: With dead ends: 29 [2022-01-31 21:41:15,947 INFO L226 Difference]: Without dead ends: 15 [2022-01-31 21:41:15,949 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 21:41:15,953 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:15,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-31 21:41:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-31 21:41:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-01-31 21:41:15,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2022-01-31 21:41:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:15,981 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-01-31 21:41:15,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-01-31 21:41:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 21:41:15,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:15,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:15,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:41:15,983 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1187666007, now seen corresponding path program 1 times [2022-01-31 21:41:15,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:15,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80173178] [2022-01-31 21:41:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:15,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:15,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:15,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:16,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,063 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 21:41:16,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:16,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80173178] [2022-01-31 21:41:16,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [80173178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:16,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:16,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 21:41:16,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772521635] [2022-01-31 21:41:16,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:16,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 21:41:16,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 21:41:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:41:16,066 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:16,116 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-01-31 21:41:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 21:41:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 21:41:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:16,117 INFO L225 Difference]: With dead ends: 22 [2022-01-31 21:41:16,117 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 21:41:16,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:41:16,118 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:16,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 21:41:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-01-31 21:41:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-01-31 21:41:16,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2022-01-31 21:41:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:16,125 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-01-31 21:41:16,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-01-31 21:41:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 21:41:16,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:16,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:16,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:41:16,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1837062518, now seen corresponding path program 1 times [2022-01-31 21:41:16,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:16,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025228093] [2022-01-31 21:41:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:16,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:16,131 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:16,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:16,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,197 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 21:41:16,198 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025228093] [2022-01-31 21:41:16,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025228093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:16,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:16,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 21:41:16,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745254056] [2022-01-31 21:41:16,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:16,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 21:41:16,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 21:41:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:41:16,200 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:16,233 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-01-31 21:41:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 21:41:16,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 21:41:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:16,234 INFO L225 Difference]: With dead ends: 20 [2022-01-31 21:41:16,234 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 21:41:16,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 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 21:41:16,235 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:16,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 21:41:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 21:41:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-01-31 21:41:16,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2022-01-31 21:41:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:16,240 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-01-31 21:41:16,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-01-31 21:41:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 21:41:16,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:16,241 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:16,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:41:16,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1837111337, now seen corresponding path program 2 times [2022-01-31 21:41:16,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:16,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110730135] [2022-01-31 21:41:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:16,244 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:16,244 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:16,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:16,245 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,302 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 21:41:16,303 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110730135] [2022-01-31 21:41:16,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [110730135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:16,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:16,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:41:16,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186009475] [2022-01-31 21:41:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:16,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:41:16,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:41:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 21:41:16,304 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:16,368 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-01-31 21:41:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 21:41:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 21:41:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:16,369 INFO L225 Difference]: With dead ends: 23 [2022-01-31 21:41:16,369 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 21:41:16,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:41:16,370 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:16,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 21:41:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-01-31 21:41:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-31 21:41:16,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2022-01-31 21:41:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:16,376 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-31 21:41:16,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-31 21:41:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 21:41:16,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:16,376 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:16,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:41:16,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:16,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1115879670, now seen corresponding path program 2 times [2022-01-31 21:41:16,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:16,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061223918] [2022-01-31 21:41:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:16,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:16,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:16,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:16,383 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,468 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 21:41:16,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061223918] [2022-01-31 21:41:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1061223918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:16,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:16,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:41:16,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792295264] [2022-01-31 21:41:16,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:41:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:41:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 21:41:16,472 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:16,534 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-01-31 21:41:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 21:41:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 21:41:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:16,537 INFO L225 Difference]: With dead ends: 21 [2022-01-31 21:41:16,538 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 21:41:16,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 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 21:41:16,539 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:16,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 21:41:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 21:41:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-01-31 21:41:16,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2022-01-31 21:41:16,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:16,543 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-01-31 21:41:16,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-01-31 21:41:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 21:41:16,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:16,544 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:16,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 21:41:16,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1115928489, now seen corresponding path program 3 times [2022-01-31 21:41:16,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:16,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031910975] [2022-01-31 21:41:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:16,546 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:16,546 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:16,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:16,548 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:16,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:16,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031910975] [2022-01-31 21:41:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031910975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:16,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:41:16,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604990229] [2022-01-31 21:41:16,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:16,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:41:16,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:41:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:41:16,609 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:16,711 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-01-31 21:41:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 21:41:16,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 21:41:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:16,713 INFO L225 Difference]: With dead ends: 24 [2022-01-31 21:41:16,713 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 21:41:16,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:41:16,715 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:16,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 21:41:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-01-31 21:41:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-01-31 21:41:16,719 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2022-01-31 21:41:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:16,719 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-01-31 21:41:16,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-01-31 21:41:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 21:41:16,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:16,720 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:16,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 21:41:16,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash 234047862, now seen corresponding path program 3 times [2022-01-31 21:41:16,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:16,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008263853] [2022-01-31 21:41:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:16,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:16,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:16,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:16,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,797 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 21:41:16,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:16,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008263853] [2022-01-31 21:41:16,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2008263853] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:16,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:16,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:41:16,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802561331] [2022-01-31 21:41:16,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:16,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:41:16,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:16,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:41:16,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:41:16,802 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:16,859 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-01-31 21:41:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 21:41:16,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 21:41:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:16,860 INFO L225 Difference]: With dead ends: 22 [2022-01-31 21:41:16,860 INFO L226 Difference]: Without dead ends: 18 [2022-01-31 21:41:16,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 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 21:41:16,862 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:16,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-31 21:41:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-31 21:41:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-01-31 21:41:16,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2022-01-31 21:41:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:16,872 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-01-31 21:41:16,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-01-31 21:41:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 21:41:16,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:16,872 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:16,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 21:41:16,873 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:16,873 INFO L85 PathProgramCache]: Analyzing trace with hash 234096681, now seen corresponding path program 4 times [2022-01-31 21:41:16,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:16,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58134035] [2022-01-31 21:41:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:16,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:16,876 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:16,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:16,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:16,980 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 21:41:16,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:16,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58134035] [2022-01-31 21:41:16,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [58134035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:16,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:16,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:41:16,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836663151] [2022-01-31 21:41:16,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:16,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:41:16,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:41:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:41:16,983 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:17,114 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-01-31 21:41:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:41:17,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 21:41:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:17,115 INFO L225 Difference]: With dead ends: 25 [2022-01-31 21:41:17,115 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 21:41:17,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:41:17,116 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:17,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 21:41:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-01-31 21:41:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-01-31 21:41:17,119 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-01-31 21:41:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:17,119 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-01-31 21:41:17,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-01-31 21:41:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 21:41:17,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:17,120 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:17,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 21:41:17,120 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1332934410, now seen corresponding path program 4 times [2022-01-31 21:41:17,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953824090] [2022-01-31 21:41:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:17,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:17,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:17,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:17,130 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:17,209 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 21:41:17,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953824090] [2022-01-31 21:41:17,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953824090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:17,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:17,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:41:17,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639639360] [2022-01-31 21:41:17,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:17,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:41:17,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:41:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:41:17,210 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:17,277 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-01-31 21:41:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:41:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:41:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:17,279 INFO L225 Difference]: With dead ends: 23 [2022-01-31 21:41:17,279 INFO L226 Difference]: Without dead ends: 19 [2022-01-31 21:41:17,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:41:17,281 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:17,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-31 21:41:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-31 21:41:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-01-31 21:41:17,289 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2022-01-31 21:41:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:17,289 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-01-31 21:41:17,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-01-31 21:41:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 21:41:17,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:17,290 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:17,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 21:41:17,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1332885591, now seen corresponding path program 5 times [2022-01-31 21:41:17,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:17,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155250809] [2022-01-31 21:41:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:17,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:17,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:17,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:17,295 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:17,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:17,392 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 21:41:17,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:17,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155250809] [2022-01-31 21:41:17,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [155250809] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:17,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:17,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:41:17,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544887991] [2022-01-31 21:41:17,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:17,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:41:17,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:41:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:41:17,393 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:17,518 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-01-31 21:41:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:41:17,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:41:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:17,519 INFO L225 Difference]: With dead ends: 26 [2022-01-31 21:41:17,519 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 21:41:17,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:41:17,520 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:17,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 21:41:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-01-31 21:41:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-31 21:41:17,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2022-01-31 21:41:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:17,527 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-31 21:41:17,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-31 21:41:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 21:41:17,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:17,528 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:17,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 21:41:17,528 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:17,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1630222710, now seen corresponding path program 5 times [2022-01-31 21:41:17,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:17,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754918617] [2022-01-31 21:41:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:17,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:17,533 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:17,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:17,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:17,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:17,636 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 21:41:17,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754918617] [2022-01-31 21:41:17,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [754918617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:17,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:17,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:41:17,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114370764] [2022-01-31 21:41:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:17,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:41:17,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:17,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:41:17,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:41:17,638 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:17,700 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-01-31 21:41:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:41:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 21:41:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:17,702 INFO L225 Difference]: With dead ends: 24 [2022-01-31 21:41:17,702 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 21:41:17,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 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 21:41:17,703 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:17,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 21:41:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 21:41:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-01-31 21:41:17,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2022-01-31 21:41:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:17,709 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-01-31 21:41:17,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-01-31 21:41:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 21:41:17,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:17,711 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:17,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 21:41:17,711 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1630271529, now seen corresponding path program 6 times [2022-01-31 21:41:17,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:17,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565408917] [2022-01-31 21:41:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:17,713 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:17,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:17,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:17,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:17,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:17,817 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 21:41:17,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:17,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565408917] [2022-01-31 21:41:17,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [565408917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:17,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:17,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:41:17,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18782158] [2022-01-31 21:41:17,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:17,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:41:17,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:41:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:41:17,819 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:17,940 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-01-31 21:41:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:41:17,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 21:41:17,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:17,941 INFO L225 Difference]: With dead ends: 27 [2022-01-31 21:41:17,941 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 21:41:17,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:41:17,942 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:17,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 21:41:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-31 21:41:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-31 21:41:17,945 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2022-01-31 21:41:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:17,945 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-31 21:41:17,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-31 21:41:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 21:41:17,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:17,946 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:17,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 21:41:17,946 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:17,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1001187082, now seen corresponding path program 6 times [2022-01-31 21:41:17,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:17,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464788765] [2022-01-31 21:41:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:17,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:17,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:17,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:17,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,035 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 21:41:18,035 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464788765] [2022-01-31 21:41:18,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [464788765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:18,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:18,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:41:18,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477789598] [2022-01-31 21:41:18,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:18,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:41:18,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:41:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:41:18,036 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:18,124 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-01-31 21:41:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:41:18,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 21:41:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:18,125 INFO L225 Difference]: With dead ends: 25 [2022-01-31 21:41:18,125 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 21:41:18,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 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 21:41:18,126 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:18,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 21:41:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-31 21:41:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-01-31 21:41:18,130 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2022-01-31 21:41:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:18,130 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-01-31 21:41:18,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-01-31 21:41:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 21:41:18,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:18,130 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:18,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 21:41:18,131 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1001138263, now seen corresponding path program 7 times [2022-01-31 21:41:18,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:18,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216434947] [2022-01-31 21:41:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:18,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:18,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:18,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:18,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:18,225 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216434947] [2022-01-31 21:41:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [216434947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:18,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:18,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:41:18,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306026328] [2022-01-31 21:41:18,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:18,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:41:18,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:41:18,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:41:18,227 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:18,378 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-01-31 21:41:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:41:18,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 21:41:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:18,378 INFO L225 Difference]: With dead ends: 28 [2022-01-31 21:41:18,378 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 21:41:18,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:41:18,379 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:18,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:18,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 21:41:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-01-31 21:41:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-01-31 21:41:18,383 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2022-01-31 21:41:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:18,383 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-01-31 21:41:18,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-01-31 21:41:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 21:41:18,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:18,384 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:18,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 21:41:18,384 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash -970512010, now seen corresponding path program 7 times [2022-01-31 21:41:18,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:18,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072905527] [2022-01-31 21:41:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:18,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:18,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:18,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:18,386 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,490 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 21:41:18,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:18,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072905527] [2022-01-31 21:41:18,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072905527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:18,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:18,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:41:18,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274461160] [2022-01-31 21:41:18,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:18,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:41:18,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:18,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:41:18,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:41:18,492 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:18,574 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-01-31 21:41:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:41:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 21:41:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:18,575 INFO L225 Difference]: With dead ends: 26 [2022-01-31 21:41:18,575 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 21:41:18,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 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 21:41:18,577 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:18,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 21:41:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 21:41:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-01-31 21:41:18,582 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 18 [2022-01-31 21:41:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:18,582 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-01-31 21:41:18,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-01-31 21:41:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 21:41:18,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:18,584 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:18,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 21:41:18,585 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash -970463191, now seen corresponding path program 8 times [2022-01-31 21:41:18,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:18,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120614037] [2022-01-31 21:41:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:18,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:18,588 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:18,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:18,588 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,695 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 21:41:18,695 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:18,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120614037] [2022-01-31 21:41:18,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2120614037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:18,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:18,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:41:18,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663856752] [2022-01-31 21:41:18,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:18,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:41:18,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:41:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:41:18,696 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:18,864 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-01-31 21:41:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:41:18,864 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 21:41:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:18,865 INFO L225 Difference]: With dead ends: 29 [2022-01-31 21:41:18,865 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 21:41:18,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:41:18,865 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:18,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 21:41:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-01-31 21:41:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-31 21:41:18,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2022-01-31 21:41:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:18,869 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-31 21:41:18,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-31 21:41:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 21:41:18,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:18,869 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:18,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 21:41:18,869 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash -19584778, now seen corresponding path program 8 times [2022-01-31 21:41:18,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:18,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944185976] [2022-01-31 21:41:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:18,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:18,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:18,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:18,872 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:18,986 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944185976] [2022-01-31 21:41:18,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944185976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:18,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:18,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:41:18,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883236381] [2022-01-31 21:41:18,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:18,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:41:18,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:18,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:41:18,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:41:18,987 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:19,081 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-01-31 21:41:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:41:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 21:41:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:19,081 INFO L225 Difference]: With dead ends: 27 [2022-01-31 21:41:19,081 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 21:41:19,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 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 21:41:19,082 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:19,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 21:41:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 21:41:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-01-31 21:41:19,087 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2022-01-31 21:41:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:19,088 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-01-31 21:41:19,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-01-31 21:41:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 21:41:19,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:19,090 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:19,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 21:41:19,090 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:19,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:19,091 INFO L85 PathProgramCache]: Analyzing trace with hash -19535959, now seen corresponding path program 9 times [2022-01-31 21:41:19,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:19,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645004995] [2022-01-31 21:41:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:19,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:19,092 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:19,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:19,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:19,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:19,196 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 21:41:19,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645004995] [2022-01-31 21:41:19,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645004995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:19,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:19,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:41:19,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937930949] [2022-01-31 21:41:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:19,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:41:19,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:41:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:41:19,198 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:19,393 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-01-31 21:41:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:41:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 21:41:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:19,393 INFO L225 Difference]: With dead ends: 30 [2022-01-31 21:41:19,393 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 21:41:19,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:41:19,394 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:19,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 21:41:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-01-31 21:41:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-01-31 21:41:19,397 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2022-01-31 21:41:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:19,397 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-01-31 21:41:19,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-01-31 21:41:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:41:19,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:19,398 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:19,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 21:41:19,398 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash -605611658, now seen corresponding path program 9 times [2022-01-31 21:41:19,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:19,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679194480] [2022-01-31 21:41:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:19,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:19,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:19,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:19,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:19,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:19,512 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 21:41:19,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:19,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679194480] [2022-01-31 21:41:19,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679194480] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:19,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:19,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:41:19,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410186331] [2022-01-31 21:41:19,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:19,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:41:19,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:19,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:41:19,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:41:19,513 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:19,616 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-01-31 21:41:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:41:19,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:41:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:19,617 INFO L225 Difference]: With dead ends: 28 [2022-01-31 21:41:19,617 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 21:41:19,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 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 21:41:19,617 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:19,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 21:41:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 21:41:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-01-31 21:41:19,621 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2022-01-31 21:41:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:19,621 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-01-31 21:41:19,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-01-31 21:41:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:41:19,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:19,621 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:19,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 21:41:19,621 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash -605562839, now seen corresponding path program 10 times [2022-01-31 21:41:19,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:19,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536537900] [2022-01-31 21:41:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:19,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:19,623 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:19,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:19,623 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:19,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:19,728 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 21:41:19,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536537900] [2022-01-31 21:41:19,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [536537900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:19,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:19,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:41:19,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297781970] [2022-01-31 21:41:19,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:19,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:41:19,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:41:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:41:19,729 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:19,924 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-01-31 21:41:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:41:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:41:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:19,925 INFO L225 Difference]: With dead ends: 31 [2022-01-31 21:41:19,925 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 21:41:19,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:41:19,926 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:19,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 21:41:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-01-31 21:41:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-01-31 21:41:19,942 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2022-01-31 21:41:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:19,942 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-01-31 21:41:19,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-01-31 21:41:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 21:41:19,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:19,945 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:19,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 21:41:19,946 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1592575754, now seen corresponding path program 10 times [2022-01-31 21:41:19,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:19,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818869463] [2022-01-31 21:41:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:19,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:19,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:19,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:19,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:20,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:20,069 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 21:41:20,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:20,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818869463] [2022-01-31 21:41:20,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [818869463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:20,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:20,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:41:20,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756290150] [2022-01-31 21:41:20,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:20,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:41:20,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:41:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:41:20,071 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:20,189 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-01-31 21:41:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:41:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 21:41:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:20,190 INFO L225 Difference]: With dead ends: 29 [2022-01-31 21:41:20,190 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 21:41:20,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:41:20,190 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:20,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 21:41:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 21:41:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-01-31 21:41:20,193 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2022-01-31 21:41:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:20,194 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-01-31 21:41:20,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-01-31 21:41:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 21:41:20,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:20,194 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:20,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 21:41:20,194 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:20,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1592526935, now seen corresponding path program 11 times [2022-01-31 21:41:20,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:20,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7315710] [2022-01-31 21:41:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:20,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:20,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:20,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:20,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:20,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:20,317 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 21:41:20,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:20,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7315710] [2022-01-31 21:41:20,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7315710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:20,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:20,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:41:20,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87931954] [2022-01-31 21:41:20,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:20,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:41:20,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:41:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:41:20,318 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:20,550 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-01-31 21:41:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:41:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 21:41:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:20,552 INFO L225 Difference]: With dead ends: 32 [2022-01-31 21:41:20,552 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 21:41:20,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:41:20,553 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:20,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 21:41:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-01-31 21:41:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-31 21:41:20,556 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2022-01-31 21:41:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:20,556 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-31 21:41:20,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-31 21:41:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:41:20,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:20,557 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:20,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 21:41:20,557 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2123691658, now seen corresponding path program 11 times [2022-01-31 21:41:20,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:20,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786499898] [2022-01-31 21:41:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:20,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:20,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:20,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:20,559 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:20,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:20,695 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 21:41:20,695 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:20,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786499898] [2022-01-31 21:41:20,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [786499898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:20,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:20,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:41:20,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348513659] [2022-01-31 21:41:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:20,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:41:20,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:41:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:41:20,696 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:20,859 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-01-31 21:41:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:41:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:41:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:20,859 INFO L225 Difference]: With dead ends: 30 [2022-01-31 21:41:20,859 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 21:41:20,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:41:20,860 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:20,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 21:41:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 21:41:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-01-31 21:41:20,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2022-01-31 21:41:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:20,863 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-01-31 21:41:20,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-01-31 21:41:20,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:41:20,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:20,864 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:20,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 21:41:20,864 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2123642839, now seen corresponding path program 12 times [2022-01-31 21:41:20,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:20,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592273335] [2022-01-31 21:41:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:20,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:20,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:20,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:20,866 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:21,029 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 21:41:21,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:21,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592273335] [2022-01-31 21:41:21,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592273335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:21,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:21,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:41:21,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124146510] [2022-01-31 21:41:21,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:21,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:41:21,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:21,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:41:21,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:41:21,032 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:21,271 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-01-31 21:41:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:41:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:41:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:21,272 INFO L225 Difference]: With dead ends: 33 [2022-01-31 21:41:21,272 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 21:41:21,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:41:21,273 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:21,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 21:41:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-31 21:41:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-01-31 21:41:21,276 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2022-01-31 21:41:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:21,277 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-01-31 21:41:21,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-01-31 21:41:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 21:41:21,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:21,277 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:21,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 21:41:21,277 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:21,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1408415498, now seen corresponding path program 12 times [2022-01-31 21:41:21,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:21,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107774118] [2022-01-31 21:41:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:21,279 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:21,279 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:21,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:21,282 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:21,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:21,441 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 21:41:21,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:21,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107774118] [2022-01-31 21:41:21,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1107774118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:21,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:21,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:41:21,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902083857] [2022-01-31 21:41:21,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:21,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:41:21,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:41:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:41:21,442 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:21,581 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-01-31 21:41:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:41:21,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 21:41:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:21,581 INFO L225 Difference]: With dead ends: 31 [2022-01-31 21:41:21,581 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 21:41:21,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:41:21,582 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:21,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 21:41:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 21:41:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-01-31 21:41:21,585 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2022-01-31 21:41:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:21,585 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-01-31 21:41:21,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-01-31 21:41:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 21:41:21,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:21,586 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:21,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 21:41:21,586 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:21,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1408366679, now seen corresponding path program 13 times [2022-01-31 21:41:21,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:21,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246389223] [2022-01-31 21:41:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:21,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:21,587 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:21,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:21,588 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:21,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:21,740 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 21:41:21,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246389223] [2022-01-31 21:41:21,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1246389223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:21,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:21,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:41:21,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069855949] [2022-01-31 21:41:21,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:21,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:41:21,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:41:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:41:21,742 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:22,018 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-01-31 21:41:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:41:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 21:41:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:22,019 INFO L225 Difference]: With dead ends: 34 [2022-01-31 21:41:22,019 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 21:41:22,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:41:22,019 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:22,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 21:41:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-01-31 21:41:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-01-31 21:41:22,025 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2022-01-31 21:41:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:22,025 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-01-31 21:41:22,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-01-31 21:41:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:41:22,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:22,026 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:22,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 21:41:22,026 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:22,027 INFO L85 PathProgramCache]: Analyzing trace with hash -709691018, now seen corresponding path program 13 times [2022-01-31 21:41:22,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:22,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85374965] [2022-01-31 21:41:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:22,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:22,028 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:22,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:22,030 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:22,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:22,195 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 21:41:22,195 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:22,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85374965] [2022-01-31 21:41:22,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [85374965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:22,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:22,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:41:22,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681085625] [2022-01-31 21:41:22,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:22,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:41:22,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:41:22,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:41:22,196 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:22,370 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-01-31 21:41:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:41:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:41:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:22,371 INFO L225 Difference]: With dead ends: 32 [2022-01-31 21:41:22,371 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 21:41:22,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:41:22,372 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:22,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 21:41:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 21:41:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-01-31 21:41:22,375 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2022-01-31 21:41:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:22,375 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-01-31 21:41:22,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-01-31 21:41:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:41:22,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:22,376 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:22,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 21:41:22,376 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash -709642199, now seen corresponding path program 14 times [2022-01-31 21:41:22,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:22,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046189080] [2022-01-31 21:41:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:22,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:22,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:22,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:22,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:22,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:22,543 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 21:41:22,544 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:22,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046189080] [2022-01-31 21:41:22,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046189080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:22,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:22,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:41:22,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225334981] [2022-01-31 21:41:22,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:22,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:41:22,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:22,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:41:22,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:41:22,545 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:22,849 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-01-31 21:41:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:41:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:41:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:22,850 INFO L225 Difference]: With dead ends: 35 [2022-01-31 21:41:22,850 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 21:41:22,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:41:22,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:22,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 21:41:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-01-31 21:41:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-31 21:41:22,854 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2022-01-31 21:41:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:22,854 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-31 21:41:22,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-31 21:41:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 21:41:22,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:22,854 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:22,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 21:41:22,855 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash -524068618, now seen corresponding path program 14 times [2022-01-31 21:41:22,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:22,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417602378] [2022-01-31 21:41:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:22,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:22,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:22,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:22,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:23,021 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 21:41:23,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:23,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417602378] [2022-01-31 21:41:23,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [417602378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:23,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:23,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:41:23,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730725407] [2022-01-31 21:41:23,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:23,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:41:23,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:23,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:41:23,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:41:23,023 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:23,191 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-01-31 21:41:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:41:23,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 21:41:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:23,192 INFO L225 Difference]: With dead ends: 33 [2022-01-31 21:41:23,192 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 21:41:23,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 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 21:41:23,193 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:23,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 21:41:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 21:41:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-01-31 21:41:23,196 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2022-01-31 21:41:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:23,196 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-01-31 21:41:23,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-01-31 21:41:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 21:41:23,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:23,196 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:23,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 21:41:23,197 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:23,197 INFO L85 PathProgramCache]: Analyzing trace with hash -524019799, now seen corresponding path program 15 times [2022-01-31 21:41:23,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:23,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415913078] [2022-01-31 21:41:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:23,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:23,198 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:23,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:23,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:23,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:23,371 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 21:41:23,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:23,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415913078] [2022-01-31 21:41:23,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [415913078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:23,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:23,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:41:23,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620907134] [2022-01-31 21:41:23,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:23,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:41:23,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:41:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:41:23,372 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:23,681 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-01-31 21:41:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:41:23,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 21:41:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:23,682 INFO L225 Difference]: With dead ends: 36 [2022-01-31 21:41:23,682 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 21:41:23,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:41:23,683 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:23,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 21:41:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-01-31 21:41:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-01-31 21:41:23,686 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2022-01-31 21:41:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:23,687 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-01-31 21:41:23,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-01-31 21:41:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:41:23,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:23,687 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:23,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 21:41:23,687 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash 935258486, now seen corresponding path program 15 times [2022-01-31 21:41:23,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:23,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452699123] [2022-01-31 21:41:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:23,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:23,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:23,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:23,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:23,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:23,889 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 21:41:23,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:23,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452699123] [2022-01-31 21:41:23,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [452699123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:23,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:23,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:41:23,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057693532] [2022-01-31 21:41:23,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:23,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:41:23,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:23,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:41:23,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:41:23,890 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:24,093 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-01-31 21:41:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:41:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:41:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:24,094 INFO L225 Difference]: With dead ends: 34 [2022-01-31 21:41:24,094 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 21:41:24,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:41:24,095 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:24,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 21:41:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 21:41:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-01-31 21:41:24,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2022-01-31 21:41:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:24,098 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-01-31 21:41:24,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-01-31 21:41:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:41:24,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:24,098 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:24,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 21:41:24,099 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:24,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:24,099 INFO L85 PathProgramCache]: Analyzing trace with hash 935307305, now seen corresponding path program 16 times [2022-01-31 21:41:24,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:24,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568160293] [2022-01-31 21:41:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:24,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:24,100 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:24,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:24,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:24,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:24,293 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 21:41:24,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:24,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568160293] [2022-01-31 21:41:24,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568160293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:24,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:24,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:41:24,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037726552] [2022-01-31 21:41:24,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:24,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:41:24,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:24,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:41:24,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:41:24,295 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:24,639 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-01-31 21:41:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:41:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:41:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:24,640 INFO L225 Difference]: With dead ends: 37 [2022-01-31 21:41:24,640 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 21:41:24,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:41:24,641 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:24,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 21:41:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-01-31 21:41:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-01-31 21:41:24,645 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2022-01-31 21:41:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:24,645 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-01-31 21:41:24,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-01-31 21:41:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 21:41:24,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:24,645 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:24,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 21:41:24,646 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:24,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1070241546, now seen corresponding path program 16 times [2022-01-31 21:41:24,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:24,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106754111] [2022-01-31 21:41:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:24,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:24,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:24,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:24,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:24,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:24,864 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 21:41:24,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:24,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106754111] [2022-01-31 21:41:24,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1106754111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:24,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:24,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 21:41:24,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467778934] [2022-01-31 21:41:24,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:24,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 21:41:24,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:24,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 21:41:24,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:41:24,866 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:25,092 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-01-31 21:41:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:41:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:41:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:25,093 INFO L225 Difference]: With dead ends: 35 [2022-01-31 21:41:25,093 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 21:41:25,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 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 21:41:25,093 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:25,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 21:41:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 21:41:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-01-31 21:41:25,097 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2022-01-31 21:41:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:25,097 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-01-31 21:41:25,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-01-31 21:41:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 21:41:25,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:25,097 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:25,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 21:41:25,097 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:25,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:25,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1070192727, now seen corresponding path program 17 times [2022-01-31 21:41:25,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:25,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253810546] [2022-01-31 21:41:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:25,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:25,099 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:25,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:25,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:25,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:25,336 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 21:41:25,336 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253810546] [2022-01-31 21:41:25,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253810546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:25,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:25,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:41:25,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868603678] [2022-01-31 21:41:25,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:25,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:41:25,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:41:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:41:25,337 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:25,727 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-01-31 21:41:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:41:25,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:41:25,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:25,727 INFO L225 Difference]: With dead ends: 38 [2022-01-31 21:41:25,727 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 21:41:25,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:41:25,728 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:25,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 21:41:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-01-31 21:41:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-31 21:41:25,732 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2022-01-31 21:41:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:25,732 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-31 21:41:25,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-31 21:41:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:41:25,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:25,732 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:25,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 21:41:25,732 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1183766902, now seen corresponding path program 17 times [2022-01-31 21:41:25,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:25,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935071805] [2022-01-31 21:41:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:25,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:25,734 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:25,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:25,734 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:25,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:25,956 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 21:41:25,956 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935071805] [2022-01-31 21:41:25,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [935071805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:25,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:25,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:41:25,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018847166] [2022-01-31 21:41:25,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:25,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:41:25,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:25,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:41:25,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:41:25,957 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:26,182 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-01-31 21:41:26,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:41:26,182 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:41:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:26,182 INFO L225 Difference]: With dead ends: 36 [2022-01-31 21:41:26,182 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 21:41:26,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 1 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 21:41:26,184 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:26,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 21:41:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 21:41:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-01-31 21:41:26,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2022-01-31 21:41:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:26,187 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-01-31 21:41:26,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-01-31 21:41:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:41:26,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:26,187 INFO L514 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:26,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 21:41:26,187 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1183815721, now seen corresponding path program 18 times [2022-01-31 21:41:26,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:26,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62727587] [2022-01-31 21:41:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:26,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:26,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:26,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:26,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:26,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:26,439 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 21:41:26,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:26,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62727587] [2022-01-31 21:41:26,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [62727587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:26,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:26,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:41:26,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209234087] [2022-01-31 21:41:26,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:26,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:41:26,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:41:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:41:26,442 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:26,836 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-01-31 21:41:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:41:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:41:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:26,836 INFO L225 Difference]: With dead ends: 39 [2022-01-31 21:41:26,836 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 21:41:26,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:41:26,837 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:26,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 21:41:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-01-31 21:41:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-31 21:41:26,840 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2022-01-31 21:41:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:26,840 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-31 21:41:26,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-31 21:41:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 21:41:26,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:26,841 INFO L514 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:26,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 21:41:26,841 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1956415242, now seen corresponding path program 18 times [2022-01-31 21:41:26,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:26,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444860227] [2022-01-31 21:41:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:26,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:26,842 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:26,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:26,843 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:27,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:27,099 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 21:41:27,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:27,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444860227] [2022-01-31 21:41:27,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444860227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:27,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:27,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:41:27,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447981473] [2022-01-31 21:41:27,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:27,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:41:27,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:27,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:41:27,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:41:27,101 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:27,359 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-01-31 21:41:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:41:27,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 21:41:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:27,360 INFO L225 Difference]: With dead ends: 37 [2022-01-31 21:41:27,360 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 21:41:27,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:41:27,361 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:27,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 21:41:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 21:41:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-01-31 21:41:27,365 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2022-01-31 21:41:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:27,366 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-01-31 21:41:27,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-01-31 21:41:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 21:41:27,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:27,366 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:27,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 21:41:27,366 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:27,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1956366423, now seen corresponding path program 19 times [2022-01-31 21:41:27,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:27,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180570972] [2022-01-31 21:41:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:27,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:27,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:27,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:27,371 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:27,616 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 21:41:27,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180570972] [2022-01-31 21:41:27,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [180570972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:27,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:27,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:41:27,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755735255] [2022-01-31 21:41:27,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:27,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:41:27,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:27,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:41:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:41:27,618 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:28,073 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-01-31 21:41:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:41:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 21:41:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:28,074 INFO L225 Difference]: With dead ends: 40 [2022-01-31 21:41:28,074 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 21:41:28,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:41:28,075 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:28,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 21:41:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-01-31 21:41:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-01-31 21:41:28,079 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2022-01-31 21:41:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:28,079 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-01-31 21:41:28,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-01-31 21:41:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:41:28,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:28,080 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:28,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 21:41:28,080 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash -517813898, now seen corresponding path program 19 times [2022-01-31 21:41:28,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:28,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679630694] [2022-01-31 21:41:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:28,081 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:28,081 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:28,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:28,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:28,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679630694] [2022-01-31 21:41:28,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [679630694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:28,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:28,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:41:28,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009693552] [2022-01-31 21:41:28,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:28,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:41:28,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:41:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 21:41:28,353 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:28,621 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-01-31 21:41:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:41:28,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:41:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:28,622 INFO L225 Difference]: With dead ends: 38 [2022-01-31 21:41:28,622 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 21:41:28,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:41:28,623 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:28,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 21:41:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 21:41:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-01-31 21:41:28,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2022-01-31 21:41:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:28,626 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-01-31 21:41:28,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-01-31 21:41:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:41:28,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:28,626 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:28,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 21:41:28,627 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash -517765079, now seen corresponding path program 20 times [2022-01-31 21:41:28,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:28,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519239351] [2022-01-31 21:41:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:28,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:28,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:28,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:28,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:28,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:28,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519239351] [2022-01-31 21:41:28,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [519239351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:28,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:28,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:41:28,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788896413] [2022-01-31 21:41:28,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:28,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:41:28,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:28,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:41:28,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:41:28,867 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:29,336 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-01-31 21:41:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:41:29,336 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:41:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:29,336 INFO L225 Difference]: With dead ends: 41 [2022-01-31 21:41:29,336 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 21:41:29,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:41:29,337 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:29,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 21:41:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-01-31 21:41:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-31 21:41:29,341 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2022-01-31 21:41:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:29,341 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-31 21:41:29,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-31 21:41:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 21:41:29,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:29,341 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:29,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 21:41:29,341 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1129154806, now seen corresponding path program 20 times [2022-01-31 21:41:29,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:29,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995223630] [2022-01-31 21:41:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:29,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:29,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:29,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:29,343 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:29,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:29,640 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 21:41:29,640 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995223630] [2022-01-31 21:41:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995223630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:29,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:29,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:41:29,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123647608] [2022-01-31 21:41:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:29,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:41:29,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:41:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:41:29,643 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:29,923 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-01-31 21:41:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:41:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 21:41:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:29,923 INFO L225 Difference]: With dead ends: 39 [2022-01-31 21:41:29,924 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 21:41:29,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 1 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 21:41:29,924 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:29,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 21:41:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 21:41:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-01-31 21:41:29,928 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2022-01-31 21:41:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:29,928 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-01-31 21:41:29,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-01-31 21:41:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 21:41:29,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:29,928 INFO L514 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:29,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 21:41:29,928 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1129203625, now seen corresponding path program 21 times [2022-01-31 21:41:29,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:29,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694861139] [2022-01-31 21:41:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:29,930 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:29,930 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:29,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:29,930 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:30,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:30,186 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 21:41:30,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:30,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694861139] [2022-01-31 21:41:30,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694861139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:30,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:30,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:41:30,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791156338] [2022-01-31 21:41:30,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:30,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:41:30,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:30,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:41:30,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:41:30,188 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:30,668 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-01-31 21:41:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:41:30,668 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 21:41:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:30,668 INFO L225 Difference]: With dead ends: 42 [2022-01-31 21:41:30,668 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 21:41:30,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:41:30,669 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:30,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:30,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 21:41:30,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-01-31 21:41:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-01-31 21:41:30,674 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2022-01-31 21:41:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:30,674 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-01-31 21:41:30,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-01-31 21:41:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:41:30,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:30,675 INFO L514 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:30,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 21:41:30,675 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash 645577078, now seen corresponding path program 21 times [2022-01-31 21:41:30,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:30,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228337601] [2022-01-31 21:41:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:30,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:30,677 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:30,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:30,679 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:30,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:30,957 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 21:41:30,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:30,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228337601] [2022-01-31 21:41:30,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [228337601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:30,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:30,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:41:30,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504968444] [2022-01-31 21:41:30,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:30,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:41:30,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:41:30,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:41:30,959 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:31,239 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-01-31 21:41:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:41:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:41:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:31,240 INFO L225 Difference]: With dead ends: 40 [2022-01-31 21:41:31,240 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 21:41:31,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 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 21:41:31,241 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:31,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 21:41:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 21:41:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-01-31 21:41:31,244 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2022-01-31 21:41:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:31,244 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-01-31 21:41:31,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-01-31 21:41:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:41:31,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:31,244 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:31,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 21:41:31,245 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash 645625897, now seen corresponding path program 22 times [2022-01-31 21:41:31,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:31,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530208898] [2022-01-31 21:41:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:31,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:31,246 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:31,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:31,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:31,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:31,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:31,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530208898] [2022-01-31 21:41:31,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [530208898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:31,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:31,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:41:31,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011635259] [2022-01-31 21:41:31,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:31,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:41:31,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:41:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:41:31,533 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:32,036 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-01-31 21:41:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:41:32,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:41:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:32,037 INFO L225 Difference]: With dead ends: 43 [2022-01-31 21:41:32,037 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 21:41:32,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:41:32,038 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:32,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 21:41:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-01-31 21:41:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-01-31 21:41:32,041 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2022-01-31 21:41:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:32,041 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-01-31 21:41:32,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-01-31 21:41:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 21:41:32,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:32,042 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:32,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 21:41:32,042 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1460430602, now seen corresponding path program 22 times [2022-01-31 21:41:32,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:32,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879046354] [2022-01-31 21:41:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:32,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:32,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:32,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:32,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:32,362 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 21:41:32,362 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:32,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879046354] [2022-01-31 21:41:32,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1879046354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:32,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:32,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:41:32,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625060701] [2022-01-31 21:41:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:32,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:41:32,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:41:32,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:41:32,364 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:32,676 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-01-31 21:41:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:41:32,676 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 21:41:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:32,677 INFO L225 Difference]: With dead ends: 41 [2022-01-31 21:41:32,677 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 21:41:32,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:41:32,680 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:32,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 21:41:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 21:41:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-01-31 21:41:32,687 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2022-01-31 21:41:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:32,688 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-01-31 21:41:32,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-01-31 21:41:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 21:41:32,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:32,688 INFO L514 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:32,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 21:41:32,688 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:32,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:32,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1460381783, now seen corresponding path program 23 times [2022-01-31 21:41:32,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:32,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650353711] [2022-01-31 21:41:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:32,689 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:32,689 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:32,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:32,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:32,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:32,995 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 21:41:32,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:32,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650353711] [2022-01-31 21:41:32,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650353711] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:32,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:32,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:41:32,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129168692] [2022-01-31 21:41:32,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:32,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:41:32,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:41:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:41:32,996 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:33,523 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-01-31 21:41:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:41:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 21:41:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:33,531 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:41:33,531 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 21:41:33,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:41:33,532 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:33,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 21:41:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-01-31 21:41:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-01-31 21:41:33,535 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2022-01-31 21:41:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:33,536 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-01-31 21:41:33,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-01-31 21:41:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:41:33,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:33,536 INFO L514 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:33,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 21:41:33,536 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:33,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1972808054, now seen corresponding path program 23 times [2022-01-31 21:41:33,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:33,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506669679] [2022-01-31 21:41:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:33,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:33,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:33,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:33,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:33,843 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 21:41:33,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506669679] [2022-01-31 21:41:33,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [506669679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:33,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:33,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:41:33,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037231542] [2022-01-31 21:41:33,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:33,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:41:33,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:41:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:41:33,845 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:34,163 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-01-31 21:41:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:41:34,164 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:41:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:34,165 INFO L225 Difference]: With dead ends: 42 [2022-01-31 21:41:34,165 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 21:41:34,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:41:34,166 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:34,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 21:41:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-31 21:41:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-01-31 21:41:34,169 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2022-01-31 21:41:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:34,169 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-01-31 21:41:34,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 26 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-01-31 21:41:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:41:34,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:34,170 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:34,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 21:41:34,170 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1972856873, now seen corresponding path program 24 times [2022-01-31 21:41:34,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:34,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742860851] [2022-01-31 21:41:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:34,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:34,171 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:34,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:34,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:34,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:34,480 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 21:41:34,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742860851] [2022-01-31 21:41:34,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742860851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:34,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:34,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:41:34,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429157072] [2022-01-31 21:41:34,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:34,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:41:34,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:41:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:41:34,481 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:35,037 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-01-31 21:41:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:41:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:41:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:35,037 INFO L225 Difference]: With dead ends: 45 [2022-01-31 21:41:35,037 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 21:41:35,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:41:35,038 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:35,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 21:41:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-31 21:41:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-01-31 21:41:35,042 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2022-01-31 21:41:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:35,042 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-01-31 21:41:35,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-01-31 21:41:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:41:35,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:35,042 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:35,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 21:41:35,042 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1029023990, now seen corresponding path program 24 times [2022-01-31 21:41:35,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:35,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740836527] [2022-01-31 21:41:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:35,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:35,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:35,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:35,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:35,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:35,381 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 21:41:35,381 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:35,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740836527] [2022-01-31 21:41:35,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740836527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:35,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:35,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:41:35,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831122898] [2022-01-31 21:41:35,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:35,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:41:35,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:41:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:41:35,383 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:35,718 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-01-31 21:41:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:41:35,718 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 21:41:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:35,719 INFO L225 Difference]: With dead ends: 43 [2022-01-31 21:41:35,719 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 21:41:35,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 1 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 21:41:35,720 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:35,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 21:41:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-31 21:41:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-01-31 21:41:35,723 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2022-01-31 21:41:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:35,723 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-01-31 21:41:35,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-01-31 21:41:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 21:41:35,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:35,724 INFO L514 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:35,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 21:41:35,724 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1029072809, now seen corresponding path program 25 times [2022-01-31 21:41:35,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:35,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352844437] [2022-01-31 21:41:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:35,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:35,725 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:35,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:35,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:36,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:36,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:36,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352844437] [2022-01-31 21:41:36,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [352844437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:36,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:36,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:41:36,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630387941] [2022-01-31 21:41:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:36,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:41:36,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:41:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:41:36,052 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:36,634 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-01-31 21:41:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:41:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 21:41:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:36,636 INFO L225 Difference]: With dead ends: 46 [2022-01-31 21:41:36,636 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 21:41:36,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:41:36,637 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:36,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 21:41:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-01-31 21:41:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-01-31 21:41:36,640 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2022-01-31 21:41:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:36,640 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-01-31 21:41:36,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-01-31 21:41:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:41:36,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:36,641 INFO L514 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:36,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 21:41:36,641 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:36,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1836489078, now seen corresponding path program 25 times [2022-01-31 21:41:36,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:36,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377608393] [2022-01-31 21:41:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:36,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:36,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:36,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:36,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:36,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:37,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377608393] [2022-01-31 21:41:37,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [377608393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:37,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:37,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:41:37,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273312955] [2022-01-31 21:41:37,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:37,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:41:37,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:41:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:41:37,009 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:37,379 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-01-31 21:41:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:41:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:41:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:37,380 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:41:37,380 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 21:41:37,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:41:37,381 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:37,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 21:41:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 21:41:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-01-31 21:41:37,384 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 36 [2022-01-31 21:41:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:37,384 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-01-31 21:41:37,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 28 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-01-31 21:41:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:41:37,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:37,385 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:37,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 21:41:37,385 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:37,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1836537897, now seen corresponding path program 26 times [2022-01-31 21:41:37,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:37,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367015366] [2022-01-31 21:41:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:37,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:37,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:37,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:37,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:37,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:37,740 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 21:41:37,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367015366] [2022-01-31 21:41:37,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [367015366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:37,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:37,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:41:37,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227993248] [2022-01-31 21:41:37,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:37,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:41:37,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:41:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:41:37,741 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:38,366 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-01-31 21:41:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:41:38,367 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:41:38,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:38,367 INFO L225 Difference]: With dead ends: 47 [2022-01-31 21:41:38,367 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 21:41:38,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:41:38,368 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:38,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 21:41:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-01-31 21:41:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-01-31 21:41:38,372 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2022-01-31 21:41:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:38,372 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-01-31 21:41:38,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-01-31 21:41:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 21:41:38,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:38,372 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:38,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 21:41:38,372 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1098103030, now seen corresponding path program 26 times [2022-01-31 21:41:38,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:38,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116217209] [2022-01-31 21:41:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:38,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:38,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:38,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:38,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:38,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:38,755 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 21:41:38,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:38,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116217209] [2022-01-31 21:41:38,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116217209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:38,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:38,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:41:38,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778209758] [2022-01-31 21:41:38,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:38,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:41:38,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:41:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:41:38,756 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:39,127 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-01-31 21:41:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:41:39,127 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 21:41:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:39,127 INFO L225 Difference]: With dead ends: 45 [2022-01-31 21:41:39,127 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 21:41:39,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:41:39,128 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:39,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 21:41:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-31 21:41:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-01-31 21:41:39,132 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2022-01-31 21:41:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:39,132 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-01-31 21:41:39,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 29 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-01-31 21:41:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 21:41:39,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:39,132 INFO L514 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:39,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 21:41:39,132 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:39,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1098151849, now seen corresponding path program 27 times [2022-01-31 21:41:39,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:39,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625053988] [2022-01-31 21:41:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:39,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:39,134 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:39,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:39,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:39,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:39,539 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 21:41:39,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625053988] [2022-01-31 21:41:39,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [625053988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:39,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:39,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:41:39,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476130410] [2022-01-31 21:41:39,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:39,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:41:39,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:41:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:41:39,540 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:40,189 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-01-31 21:41:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:41:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 21:41:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:40,190 INFO L225 Difference]: With dead ends: 48 [2022-01-31 21:41:40,190 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 21:41:40,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:41:40,192 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:40,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 21:41:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-01-31 21:41:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-01-31 21:41:40,196 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2022-01-31 21:41:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:40,196 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-01-31 21:41:40,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-01-31 21:41:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:41:40,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:40,196 INFO L514 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:40,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 21:41:40,197 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash -317027978, now seen corresponding path program 27 times [2022-01-31 21:41:40,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:40,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079097813] [2022-01-31 21:41:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:40,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:40,198 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:40,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:40,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:40,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:40,632 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 21:41:40,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:40,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079097813] [2022-01-31 21:41:40,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079097813] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:40,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:40,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:41:40,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306807146] [2022-01-31 21:41:40,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:40,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:41:40,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:41:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:41:40,636 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:41,032 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-01-31 21:41:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:41:41,032 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:41:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:41,032 INFO L225 Difference]: With dead ends: 46 [2022-01-31 21:41:41,033 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 21:41:41,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:41:41,033 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:41,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 21:41:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-31 21:41:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-01-31 21:41:41,037 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2022-01-31 21:41:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:41,037 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-01-31 21:41:41,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 30 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-01-31 21:41:41,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:41:41,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:41,037 INFO L514 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:41,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 21:41:41,037 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:41,038 INFO L85 PathProgramCache]: Analyzing trace with hash -316979159, now seen corresponding path program 28 times [2022-01-31 21:41:41,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:41,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688612039] [2022-01-31 21:41:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:41,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:41,039 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:41,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:41,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:41,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:41,448 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 21:41:41,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688612039] [2022-01-31 21:41:41,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1688612039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:41,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:41,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:41:41,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008683660] [2022-01-31 21:41:41,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:41,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:41:41,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:41:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:41:41,449 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:42,180 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-01-31 21:41:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:41:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:41:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:42,180 INFO L225 Difference]: With dead ends: 49 [2022-01-31 21:41:42,180 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 21:41:42,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:41:42,181 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:42,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 21:41:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-01-31 21:41:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-01-31 21:41:42,185 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2022-01-31 21:41:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:42,185 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-01-31 21:41:42,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-01-31 21:41:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 21:41:42,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:42,185 INFO L514 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:42,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 21:41:42,186 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:42,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1236416266, now seen corresponding path program 28 times [2022-01-31 21:41:42,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:42,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432322707] [2022-01-31 21:41:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:42,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:42,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:42,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:42,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:42,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:42,627 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432322707] [2022-01-31 21:41:42,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [432322707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:42,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:42,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:41:42,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288871788] [2022-01-31 21:41:42,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:42,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:41:42,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:41:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:41:42,628 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:43,091 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-01-31 21:41:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:41:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:41:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:43,092 INFO L225 Difference]: With dead ends: 47 [2022-01-31 21:41:43,092 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 21:41:43,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:41:43,092 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:43,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 21:41:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-31 21:41:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-01-31 21:41:43,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 39 [2022-01-31 21:41:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:43,096 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-01-31 21:41:43,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 31 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-01-31 21:41:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 21:41:43,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:43,096 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:43,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 21:41:43,097 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1236367447, now seen corresponding path program 29 times [2022-01-31 21:41:43,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:43,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560298520] [2022-01-31 21:41:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:43,098 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:43,098 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:43,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:43,098 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:43,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:43,534 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 21:41:43,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:43,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560298520] [2022-01-31 21:41:43,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560298520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:43,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:43,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:41:43,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21024393] [2022-01-31 21:41:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:43,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:41:43,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:41:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:41:43,535 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:44,256 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-01-31 21:41:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:41:44,259 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:41:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:44,259 INFO L225 Difference]: With dead ends: 50 [2022-01-31 21:41:44,259 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 21:41:44,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:41:44,260 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:44,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 21:41:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-01-31 21:41:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-01-31 21:41:44,264 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2022-01-31 21:41:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:44,264 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-01-31 21:41:44,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-01-31 21:41:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:41:44,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:44,265 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:44,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 21:41:44,265 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:44,265 INFO L85 PathProgramCache]: Analyzing trace with hash 327317878, now seen corresponding path program 29 times [2022-01-31 21:41:44,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:44,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007464995] [2022-01-31 21:41:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:44,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:44,266 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:44,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:44,267 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:44,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:44,720 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 21:41:44,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007464995] [2022-01-31 21:41:44,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007464995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:44,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:44,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:41:44,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782119011] [2022-01-31 21:41:44,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:44,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:41:44,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:41:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:41:44,721 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:45,172 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-01-31 21:41:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:41:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:41:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:45,173 INFO L225 Difference]: With dead ends: 48 [2022-01-31 21:41:45,173 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 21:41:45,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 1 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 21:41:45,173 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:45,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 21:41:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 21:41:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-01-31 21:41:45,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2022-01-31 21:41:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:45,177 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-01-31 21:41:45,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 32 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-01-31 21:41:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:41:45,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:45,178 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:45,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 21:41:45,178 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash 327366697, now seen corresponding path program 30 times [2022-01-31 21:41:45,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:45,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017587665] [2022-01-31 21:41:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:45,179 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:45,179 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:45,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:45,180 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:45,614 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 21:41:45,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:45,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017587665] [2022-01-31 21:41:45,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017587665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:45,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:45,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:41:45,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082375319] [2022-01-31 21:41:45,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:45,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:41:45,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:41:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:41:45,615 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:46,409 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-01-31 21:41:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:41:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:41:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:46,410 INFO L225 Difference]: With dead ends: 51 [2022-01-31 21:41:46,410 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 21:41:46,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:41:46,411 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:46,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 21:41:46,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-01-31 21:41:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-01-31 21:41:46,414 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2022-01-31 21:41:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:46,415 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-01-31 21:41:46,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-01-31 21:41:46,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:41:46,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:46,415 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:46,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 21:41:46,415 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:46,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1558436086, now seen corresponding path program 30 times [2022-01-31 21:41:46,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601346963] [2022-01-31 21:41:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:46,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:46,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:46,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:46,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:46,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:46,877 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 21:41:46,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:46,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601346963] [2022-01-31 21:41:46,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601346963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:46,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:46,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:41:46,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401941106] [2022-01-31 21:41:46,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:46,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:41:46,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:41:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:41:46,878 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:47,333 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-01-31 21:41:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:41:47,334 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 21:41:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:47,334 INFO L225 Difference]: With dead ends: 49 [2022-01-31 21:41:47,334 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 21:41:47,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:41:47,335 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:47,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 21:41:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-01-31 21:41:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-01-31 21:41:47,338 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2022-01-31 21:41:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:47,339 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-01-31 21:41:47,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 33 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-01-31 21:41:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:41:47,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:47,339 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:47,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 21:41:47,339 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1558484905, now seen corresponding path program 31 times [2022-01-31 21:41:47,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:47,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657732524] [2022-01-31 21:41:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:47,340 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:47,340 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:47,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:47,341 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:47,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:47,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:47,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657732524] [2022-01-31 21:41:47,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [657732524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:47,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:47,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:41:47,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287960332] [2022-01-31 21:41:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:47,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:41:47,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:47,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:41:47,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:41:47,795 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:48,630 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-01-31 21:41:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:41:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 21:41:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:48,631 INFO L225 Difference]: With dead ends: 52 [2022-01-31 21:41:48,631 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 21:41:48,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:41:48,632 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:48,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 21:41:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-01-31 21:41:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-01-31 21:41:48,636 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2022-01-31 21:41:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:48,636 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-01-31 21:41:48,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-01-31 21:41:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:41:48,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:48,636 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:48,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 21:41:48,637 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1068394870, now seen corresponding path program 31 times [2022-01-31 21:41:48,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:48,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339005274] [2022-01-31 21:41:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:48,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:48,638 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:48,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:48,639 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:49,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:49,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339005274] [2022-01-31 21:41:49,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339005274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:49,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:49,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:41:49,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014631530] [2022-01-31 21:41:49,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:49,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:41:49,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:41:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:41:49,129 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:49,618 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-01-31 21:41:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:41:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:41:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:49,618 INFO L225 Difference]: With dead ends: 50 [2022-01-31 21:41:49,619 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 21:41:49,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:41:49,619 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:49,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 21:41:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-31 21:41:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-01-31 21:41:49,623 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 42 [2022-01-31 21:41:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:49,623 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-01-31 21:41:49,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-01-31 21:41:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:41:49,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:49,624 INFO L514 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:49,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 21:41:49,624 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1068443689, now seen corresponding path program 32 times [2022-01-31 21:41:49,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:49,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322021671] [2022-01-31 21:41:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:49,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:49,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:49,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:49,626 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:50,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:50,102 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 21:41:50,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:50,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322021671] [2022-01-31 21:41:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322021671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:50,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:50,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:41:50,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193562117] [2022-01-31 21:41:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:50,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:41:50,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:41:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:41:50,104 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:50,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:50,972 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-01-31 21:41:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:41:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:41:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:50,973 INFO L225 Difference]: With dead ends: 53 [2022-01-31 21:41:50,973 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 21:41:50,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:41:50,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:50,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 21:41:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-01-31 21:41:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-01-31 21:41:50,978 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2022-01-31 21:41:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:50,979 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-01-31 21:41:50,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-01-31 21:41:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 21:41:50,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:50,979 INFO L514 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:50,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 21:41:50,979 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1237980938, now seen corresponding path program 32 times [2022-01-31 21:41:50,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:50,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460333394] [2022-01-31 21:41:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:50,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:50,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:50,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:50,981 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:51,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:51,497 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 21:41:51,497 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:51,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460333394] [2022-01-31 21:41:51,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1460333394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:51,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:51,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:41:51,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816738479] [2022-01-31 21:41:51,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:51,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:41:51,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:41:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:41:51,498 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:52,004 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-01-31 21:41:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:41:52,004 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 21:41:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:52,005 INFO L225 Difference]: With dead ends: 51 [2022-01-31 21:41:52,005 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 21:41:52,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:41:52,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:52,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:41:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 21:41:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-31 21:41:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-01-31 21:41:52,010 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2022-01-31 21:41:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:52,010 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-01-31 21:41:52,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-01-31 21:41:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 21:41:52,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:52,010 INFO L514 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:52,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 21:41:52,010 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:52,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1237932119, now seen corresponding path program 33 times [2022-01-31 21:41:52,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:52,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884416582] [2022-01-31 21:41:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:52,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:52,012 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:52,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:52,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:52,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:52,507 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 21:41:52,507 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:52,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884416582] [2022-01-31 21:41:52,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1884416582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:52,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:52,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:41:52,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491561550] [2022-01-31 21:41:52,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:52,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:41:52,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:41:52,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:41:52,508 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:53,408 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-01-31 21:41:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:41:53,409 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 21:41:53,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:53,409 INFO L225 Difference]: With dead ends: 54 [2022-01-31 21:41:53,409 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 21:41:53,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:41:53,410 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:53,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 21:41:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-01-31 21:41:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-01-31 21:41:53,420 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2022-01-31 21:41:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:53,421 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-01-31 21:41:53,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-01-31 21:41:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:41:53,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:53,421 INFO L514 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:53,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 21:41:53,421 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:53,421 INFO L85 PathProgramCache]: Analyzing trace with hash 278813046, now seen corresponding path program 33 times [2022-01-31 21:41:53,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:53,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723843730] [2022-01-31 21:41:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:53,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:53,422 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:53,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:53,423 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:53,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:53,961 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 21:41:53,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723843730] [2022-01-31 21:41:53,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [723843730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:53,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:53,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:41:53,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167744118] [2022-01-31 21:41:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:53,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:41:53,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:41:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:41:53,962 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:54,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:54,507 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-01-31 21:41:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:41:54,507 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:41:54,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:54,508 INFO L225 Difference]: With dead ends: 52 [2022-01-31 21:41:54,508 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 21:41:54,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:41:54,509 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:54,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 21:41:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 21:41:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-01-31 21:41:54,513 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2022-01-31 21:41:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:54,514 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-01-31 21:41:54,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 36 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-01-31 21:41:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:41:54,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:54,514 INFO L514 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:54,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 21:41:54,514 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash 278861865, now seen corresponding path program 34 times [2022-01-31 21:41:54,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:54,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586464368] [2022-01-31 21:41:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:54,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:54,515 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:54,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:54,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:55,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:41:55,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586464368] [2022-01-31 21:41:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [586464368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:55,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:55,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:41:55,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356982662] [2022-01-31 21:41:55,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:55,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:41:55,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:41:55,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:41:55,180 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:56,102 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-01-31 21:41:56,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:41:56,102 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:41:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:56,103 INFO L225 Difference]: With dead ends: 55 [2022-01-31 21:41:56,103 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 21:41:56,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:41:56,104 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:56,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 21:41:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-01-31 21:41:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-01-31 21:41:56,108 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2022-01-31 21:41:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:56,108 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-01-31 21:41:56,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-01-31 21:41:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 21:41:56,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:56,108 INFO L514 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:56,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 21:41:56,109 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash 54786294, now seen corresponding path program 34 times [2022-01-31 21:41:56,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:56,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524223770] [2022-01-31 21:41:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:56,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:56,110 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:56,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:56,110 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:56,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:56,665 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 21:41:56,666 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:56,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524223770] [2022-01-31 21:41:56,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524223770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:56,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:56,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:41:56,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969841525] [2022-01-31 21:41:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:41:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:41:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:41:56,667 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:57,234 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-01-31 21:41:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:41:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 21:41:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:57,235 INFO L225 Difference]: With dead ends: 53 [2022-01-31 21:41:57,235 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 21:41:57,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:41:57,236 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:57,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 21:41:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-31 21:41:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-01-31 21:41:57,240 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 45 [2022-01-31 21:41:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:57,240 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-01-31 21:41:57,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 37 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-01-31 21:41:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 21:41:57,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:57,241 INFO L514 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:57,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 21:41:57,241 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash 54835113, now seen corresponding path program 35 times [2022-01-31 21:41:57,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:57,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166046572] [2022-01-31 21:41:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:57,242 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:57,242 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:57,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:57,243 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:57,803 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 21:41:57,803 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:57,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166046572] [2022-01-31 21:41:57,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [166046572] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:57,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:57,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:41:57,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745523277] [2022-01-31 21:41:57,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:57,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:41:57,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:41:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:41:57,805 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:58,777 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-01-31 21:41:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:41:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 21:41:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:58,778 INFO L225 Difference]: With dead ends: 56 [2022-01-31 21:41:58,778 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 21:41:58,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:41:58,779 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:58,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 21:41:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-01-31 21:41:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-01-31 21:41:58,783 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2022-01-31 21:41:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:58,784 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-01-31 21:41:58,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-01-31 21:41:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:41:58,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:58,784 INFO L514 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:58,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 21:41:58,784 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1699891574, now seen corresponding path program 35 times [2022-01-31 21:41:58,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:58,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396238195] [2022-01-31 21:41:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:58,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:58,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:58,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:58,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:41:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:41:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:41:59,365 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 21:41:59,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:41:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396238195] [2022-01-31 21:41:59,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [396238195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:41:59,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:41:59,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:41:59,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687580636] [2022-01-31 21:41:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:41:59,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:41:59,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:41:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:41:59,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:41:59,367 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:41:59,973 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-01-31 21:41:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:41:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:41:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:41:59,974 INFO L225 Difference]: With dead ends: 54 [2022-01-31 21:41:59,974 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 21:41:59,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:41:59,975 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:41:59,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:41:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 21:41:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 21:41:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-01-31 21:41:59,979 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2022-01-31 21:41:59,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:41:59,979 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-01-31 21:41:59,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:41:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-01-31 21:41:59,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:41:59,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:41:59,980 INFO L514 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:41:59,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:41:59,980 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:41:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:41:59,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1699940393, now seen corresponding path program 36 times [2022-01-31 21:41:59,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:41:59,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740653657] [2022-01-31 21:41:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:41:59,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:41:59,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:41:59,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:41:59,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:00,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:00,575 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 21:42:00,575 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:00,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740653657] [2022-01-31 21:42:00,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740653657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:00,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:00,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 21:42:00,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212481807] [2022-01-31 21:42:00,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:00,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:42:00,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:00,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:42:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:42:00,576 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:01,585 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-01-31 21:42:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:42:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:42:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:01,586 INFO L225 Difference]: With dead ends: 57 [2022-01-31 21:42:01,586 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 21:42:01,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:42:01,587 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:01,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 21:42:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-01-31 21:42:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-01-31 21:42:01,591 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2022-01-31 21:42:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:01,591 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-01-31 21:42:01,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-01-31 21:42:01,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:42:01,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:01,592 INFO L514 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:01,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:42:01,592 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1158547702, now seen corresponding path program 36 times [2022-01-31 21:42:01,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:01,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126597237] [2022-01-31 21:42:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:01,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:01,593 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:01,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:01,594 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:02,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:02,196 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 21:42:02,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126597237] [2022-01-31 21:42:02,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126597237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:02,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:02,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 21:42:02,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376885731] [2022-01-31 21:42:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:02,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:42:02,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:42:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:42:02,198 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:02,821 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-01-31 21:42:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:42:02,821 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 21:42:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:02,822 INFO L225 Difference]: With dead ends: 55 [2022-01-31 21:42:02,822 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 21:42:02,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 1 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 21:42:02,823 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:02,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 21:42:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-31 21:42:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-01-31 21:42:02,827 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2022-01-31 21:42:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:02,827 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-01-31 21:42:02,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-01-31 21:42:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:42:02,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:02,827 INFO L514 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:02,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:42:02,828 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1158596521, now seen corresponding path program 37 times [2022-01-31 21:42:02,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:02,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226808136] [2022-01-31 21:42:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:02,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:02,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:02,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:02,829 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:03,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:03,427 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 21:42:03,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:03,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226808136] [2022-01-31 21:42:03,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226808136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:03,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:03,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:42:03,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070768902] [2022-01-31 21:42:03,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:03,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:42:03,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:42:03,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:42:03,428 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:04,488 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-01-31 21:42:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:42:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 21:42:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:04,489 INFO L225 Difference]: With dead ends: 58 [2022-01-31 21:42:04,489 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 21:42:04,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:42:04,490 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:04,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 21:42:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-01-31 21:42:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-01-31 21:42:04,494 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2022-01-31 21:42:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:04,494 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-01-31 21:42:04,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-01-31 21:42:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:42:04,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:04,495 INFO L514 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:04,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:42:04,495 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:04,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:04,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1556756854, now seen corresponding path program 37 times [2022-01-31 21:42:04,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:04,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513451191] [2022-01-31 21:42:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:04,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:04,496 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:04,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:04,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:05,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:05,146 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 21:42:05,146 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:05,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513451191] [2022-01-31 21:42:05,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [513451191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:05,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:05,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:42:05,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152683754] [2022-01-31 21:42:05,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:05,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:42:05,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:42:05,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:42:05,148 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:05,813 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-01-31 21:42:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:42:05,813 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:42:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:05,815 INFO L225 Difference]: With dead ends: 56 [2022-01-31 21:42:05,815 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 21:42:05,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:42:05,816 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:05,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 21:42:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-31 21:42:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-01-31 21:42:05,820 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 48 [2022-01-31 21:42:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:05,820 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-01-31 21:42:05,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-01-31 21:42:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:42:05,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:05,821 INFO L514 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:05,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:42:05,821 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1556805673, now seen corresponding path program 38 times [2022-01-31 21:42:05,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:05,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028037699] [2022-01-31 21:42:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:05,822 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:05,822 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:05,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:05,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:06,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:06,454 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 21:42:06,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028037699] [2022-01-31 21:42:06,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1028037699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:06,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:06,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 21:42:06,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81008639] [2022-01-31 21:42:06,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:06,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 21:42:06,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 21:42:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:42:06,456 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:07,547 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-01-31 21:42:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:42:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:42:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:07,548 INFO L225 Difference]: With dead ends: 59 [2022-01-31 21:42:07,548 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 21:42:07,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:42:07,549 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:07,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 21:42:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-01-31 21:42:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-01-31 21:42:07,553 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2022-01-31 21:42:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:07,553 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-01-31 21:42:07,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-01-31 21:42:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 21:42:07,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:07,553 INFO L514 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:07,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:42:07,554 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:07,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1016338678, now seen corresponding path program 38 times [2022-01-31 21:42:07,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:07,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341202683] [2022-01-31 21:42:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:07,555 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:07,555 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:07,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:07,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:08,206 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 21:42:08,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:08,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341202683] [2022-01-31 21:42:08,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [341202683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:08,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:08,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 21:42:08,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361528608] [2022-01-31 21:42:08,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:08,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 21:42:08,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 21:42:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:42:08,208 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:08,880 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-01-31 21:42:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:42:08,880 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 21:42:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:08,881 INFO L225 Difference]: With dead ends: 57 [2022-01-31 21:42:08,881 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 21:42:08,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 1 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 21:42:08,882 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:08,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 21:42:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-01-31 21:42:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-01-31 21:42:08,886 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2022-01-31 21:42:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:08,887 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-01-31 21:42:08,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-01-31 21:42:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 21:42:08,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:08,887 INFO L514 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:08,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:42:08,887 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:08,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1016387497, now seen corresponding path program 39 times [2022-01-31 21:42:08,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:08,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231068427] [2022-01-31 21:42:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:08,888 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:08,888 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:08,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:08,889 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:09,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:09,542 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 21:42:09,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:09,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231068427] [2022-01-31 21:42:09,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [231068427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:09,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:09,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 21:42:09,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819104884] [2022-01-31 21:42:09,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:09,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 21:42:09,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 21:42:09,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:42:09,545 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:10,682 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-01-31 21:42:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 21:42:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 21:42:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:10,683 INFO L225 Difference]: With dead ends: 60 [2022-01-31 21:42:10,683 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 21:42:10,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:42:10,684 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:10,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 21:42:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-01-31 21:42:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-01-31 21:42:10,688 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2022-01-31 21:42:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:10,689 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-01-31 21:42:10,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-01-31 21:42:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:42:10,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:10,689 INFO L514 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:10,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:42:10,689 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1443244406, now seen corresponding path program 39 times [2022-01-31 21:42:10,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:10,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965263360] [2022-01-31 21:42:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:10,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:10,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:10,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:10,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:11,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:11,379 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 21:42:11,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:11,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965263360] [2022-01-31 21:42:11,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965263360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:11,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:11,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 21:42:11,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014712369] [2022-01-31 21:42:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:11,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 21:42:11,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 21:42:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:42:11,381 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:12,089 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-01-31 21:42:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 21:42:12,089 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:42:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:12,089 INFO L225 Difference]: With dead ends: 58 [2022-01-31 21:42:12,089 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 21:42:12,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:42:12,090 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:12,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 21:42:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-31 21:42:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-01-31 21:42:12,095 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2022-01-31 21:42:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:12,095 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-01-31 21:42:12,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 42 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-01-31 21:42:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:42:12,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:12,095 INFO L514 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:12,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:42:12,095 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:12,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:12,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1443293225, now seen corresponding path program 40 times [2022-01-31 21:42:12,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:12,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103663370] [2022-01-31 21:42:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:12,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:12,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:12,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:12,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:12,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:12,767 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 21:42:12,768 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103663370] [2022-01-31 21:42:12,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [103663370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:12,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:12,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:42:12,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549543570] [2022-01-31 21:42:12,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:12,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:42:12,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:42:12,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:42:12,769 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:13,949 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-01-31 21:42:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 21:42:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:42:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:13,949 INFO L225 Difference]: With dead ends: 61 [2022-01-31 21:42:13,950 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 21:42:13,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:42:13,950 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:13,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 21:42:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-01-31 21:42:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-01-31 21:42:13,955 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2022-01-31 21:42:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:13,955 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-01-31 21:42:13,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-01-31 21:42:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 21:42:13,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:13,955 INFO L514 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:13,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:42:13,956 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:13,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1792420086, now seen corresponding path program 40 times [2022-01-31 21:42:13,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:13,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445940330] [2022-01-31 21:42:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:13,957 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:13,957 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:13,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:13,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:14,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:14,677 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 21:42:14,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:14,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445940330] [2022-01-31 21:42:14,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1445940330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:14,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:14,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:42:14,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289643575] [2022-01-31 21:42:14,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:14,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:42:14,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:42:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:42:14,678 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:15,428 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-01-31 21:42:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 21:42:15,429 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:42:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:15,429 INFO L225 Difference]: With dead ends: 59 [2022-01-31 21:42:15,429 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 21:42:15,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:42:15,430 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:15,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 21:42:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 21:42:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-01-31 21:42:15,435 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 51 [2022-01-31 21:42:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:15,435 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-01-31 21:42:15,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-01-31 21:42:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 21:42:15,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:15,436 INFO L514 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:15,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 21:42:15,436 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1792468905, now seen corresponding path program 41 times [2022-01-31 21:42:15,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:15,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395732719] [2022-01-31 21:42:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:15,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:15,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:15,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:15,438 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:16,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:16,140 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 21:42:16,140 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:16,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395732719] [2022-01-31 21:42:16,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [395732719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:16,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:16,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 21:42:16,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070485897] [2022-01-31 21:42:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:16,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 21:42:16,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 21:42:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:42:16,141 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:17,357 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-01-31 21:42:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:42:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:42:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:17,358 INFO L225 Difference]: With dead ends: 62 [2022-01-31 21:42:17,358 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 21:42:17,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:42:17,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:17,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 21:42:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-01-31 21:42:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-01-31 21:42:17,364 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2022-01-31 21:42:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:17,364 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-01-31 21:42:17,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-01-31 21:42:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:42:17,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:17,365 INFO L514 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:17,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 21:42:17,365 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:17,365 INFO L85 PathProgramCache]: Analyzing trace with hash -268035722, now seen corresponding path program 41 times [2022-01-31 21:42:17,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:17,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689479194] [2022-01-31 21:42:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:17,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:17,366 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:17,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:17,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:18,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:18,102 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 21:42:18,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:18,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689479194] [2022-01-31 21:42:18,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [689479194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:18,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:18,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 21:42:18,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059578435] [2022-01-31 21:42:18,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:18,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 21:42:18,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 21:42:18,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:42:18,103 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:18,877 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-01-31 21:42:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:42:18,877 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:42:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:18,877 INFO L225 Difference]: With dead ends: 60 [2022-01-31 21:42:18,878 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 21:42:18,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:42:18,879 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:18,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 21:42:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 21:42:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-01-31 21:42:18,883 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2022-01-31 21:42:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:18,883 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-01-31 21:42:18,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 44 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-01-31 21:42:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:42:18,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:18,884 INFO L514 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:18,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 21:42:18,884 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:18,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash -267986903, now seen corresponding path program 42 times [2022-01-31 21:42:18,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:18,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615072847] [2022-01-31 21:42:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:18,885 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:18,885 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:18,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:18,886 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:19,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:19,624 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 21:42:19,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:19,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615072847] [2022-01-31 21:42:19,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615072847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:19,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:19,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 21:42:19,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845300760] [2022-01-31 21:42:19,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:19,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 21:42:19,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 21:42:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:42:19,625 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:20,893 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-01-31 21:42:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 21:42:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:42:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:20,894 INFO L225 Difference]: With dead ends: 63 [2022-01-31 21:42:20,894 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 21:42:20,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 21:42:20,895 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:20,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 21:42:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-01-31 21:42:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-01-31 21:42:20,899 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2022-01-31 21:42:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:20,900 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-01-31 21:42:20,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-01-31 21:42:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:42:20,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:20,900 INFO L514 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:20,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 21:42:20,900 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:20,900 INFO L85 PathProgramCache]: Analyzing trace with hash 282343670, now seen corresponding path program 42 times [2022-01-31 21:42:20,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:20,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040884536] [2022-01-31 21:42:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:20,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:20,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:20,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:20,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:21,681 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 21:42:21,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:21,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040884536] [2022-01-31 21:42:21,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040884536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:21,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:21,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 21:42:21,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937368125] [2022-01-31 21:42:21,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:21,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 21:42:21,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 21:42:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:42:21,683 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:22,470 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-01-31 21:42:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 21:42:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 21:42:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:22,470 INFO L225 Difference]: With dead ends: 61 [2022-01-31 21:42:22,471 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 21:42:22,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 1 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 21:42:22,472 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:22,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 21:42:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 21:42:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-01-31 21:42:22,476 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 53 [2022-01-31 21:42:22,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:22,476 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-01-31 21:42:22,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 45 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:22,477 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-01-31 21:42:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:42:22,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:22,477 INFO L514 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:22,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 21:42:22,477 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash 282392489, now seen corresponding path program 43 times [2022-01-31 21:42:22,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:22,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470403467] [2022-01-31 21:42:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:22,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:22,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:22,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:22,479 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:23,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:42:23,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:23,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470403467] [2022-01-31 21:42:23,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470403467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:23,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:23,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:42:23,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860508358] [2022-01-31 21:42:23,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:23,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:42:23,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:42:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:42:23,247 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:24,593 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-01-31 21:42:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 21:42:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 21:42:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:24,596 INFO L225 Difference]: With dead ends: 64 [2022-01-31 21:42:24,596 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 21:42:24,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:42:24,600 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:24,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 21:42:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-01-31 21:42:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-01-31 21:42:24,606 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2022-01-31 21:42:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:24,607 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-01-31 21:42:24,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-01-31 21:42:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:42:24,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:24,607 INFO L514 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:24,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 21:42:24,607 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 164235638, now seen corresponding path program 43 times [2022-01-31 21:42:24,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584875075] [2022-01-31 21:42:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:24,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:24,615 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:24,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:24,615 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:25,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:25,405 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 21:42:25,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:25,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584875075] [2022-01-31 21:42:25,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [584875075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:25,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:25,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:42:25,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411975693] [2022-01-31 21:42:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:25,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:42:25,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:42:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:42:25,406 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:26,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:26,223 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-01-31 21:42:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 21:42:26,223 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:42:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:26,224 INFO L225 Difference]: With dead ends: 62 [2022-01-31 21:42:26,224 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 21:42:26,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 1 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 21:42:26,224 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:26,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 21:42:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-31 21:42:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-01-31 21:42:26,229 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 54 [2022-01-31 21:42:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:26,229 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-01-31 21:42:26,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 46 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-01-31 21:42:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:42:26,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:26,229 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:26,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 21:42:26,230 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:26,230 INFO L85 PathProgramCache]: Analyzing trace with hash 164284457, now seen corresponding path program 44 times [2022-01-31 21:42:26,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:26,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886475127] [2022-01-31 21:42:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:26,231 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:26,231 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:26,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:26,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:27,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:27,011 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 21:42:27,011 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:27,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886475127] [2022-01-31 21:42:27,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [886475127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:27,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:27,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 21:42:27,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711556369] [2022-01-31 21:42:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:27,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 21:42:27,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 21:42:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:42:27,012 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:28,373 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-01-31 21:42:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:42:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:42:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:28,374 INFO L225 Difference]: With dead ends: 65 [2022-01-31 21:42:28,374 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 21:42:28,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:42:28,375 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:28,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 21:42:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-01-31 21:42:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-01-31 21:42:28,379 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2022-01-31 21:42:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:28,379 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-01-31 21:42:28,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-01-31 21:42:28,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 21:42:28,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:28,380 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:28,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 21:42:28,380 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash 797853942, now seen corresponding path program 44 times [2022-01-31 21:42:28,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:28,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094440146] [2022-01-31 21:42:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:28,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:28,381 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:28,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:28,382 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:29,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:29,215 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 21:42:29,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094440146] [2022-01-31 21:42:29,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094440146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:29,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:29,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 21:42:29,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91373730] [2022-01-31 21:42:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:29,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 21:42:29,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 21:42:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:42:29,216 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:30,074 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-01-31 21:42:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:42:30,074 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 21:42:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:30,074 INFO L225 Difference]: With dead ends: 63 [2022-01-31 21:42:30,075 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 21:42:30,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:42:30,076 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:30,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 54 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 21:42:30,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-01-31 21:42:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-01-31 21:42:30,080 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2022-01-31 21:42:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:30,080 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-01-31 21:42:30,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-01-31 21:42:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 21:42:30,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:30,081 INFO L514 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:30,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 21:42:30,081 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash 797902761, now seen corresponding path program 45 times [2022-01-31 21:42:30,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:30,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193020601] [2022-01-31 21:42:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:30,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:30,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:30,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:30,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:30,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:30,916 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 21:42:30,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:30,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193020601] [2022-01-31 21:42:30,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [193020601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:30,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:30,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 21:42:30,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562977900] [2022-01-31 21:42:30,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:30,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 21:42:30,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 21:42:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:42:30,917 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:32,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:32,338 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-01-31 21:42:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 21:42:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 21:42:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:32,339 INFO L225 Difference]: With dead ends: 66 [2022-01-31 21:42:32,339 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 21:42:32,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 21:42:32,340 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:32,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 21:42:32,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-01-31 21:42:32,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-01-31 21:42:32,345 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2022-01-31 21:42:32,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:32,345 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-01-31 21:42:32,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-01-31 21:42:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:42:32,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:32,345 INFO L514 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:32,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 21:42:32,346 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:32,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1034815114, now seen corresponding path program 45 times [2022-01-31 21:42:32,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:32,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069295241] [2022-01-31 21:42:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:32,347 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:32,347 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:32,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:32,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:33,195 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 21:42:33,195 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:33,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069295241] [2022-01-31 21:42:33,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069295241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:33,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:33,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 21:42:33,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958102107] [2022-01-31 21:42:33,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:33,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 21:42:33,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 21:42:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:42:33,196 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:34,070 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-01-31 21:42:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 21:42:34,074 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:42:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:34,074 INFO L225 Difference]: With dead ends: 64 [2022-01-31 21:42:34,074 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 21:42:34,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 21:42:34,076 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:34,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 21:42:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 21:42:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-01-31 21:42:34,081 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 56 [2022-01-31 21:42:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:34,081 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-01-31 21:42:34,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-01-31 21:42:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:42:34,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:34,081 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:34,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 21:42:34,082 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1034766295, now seen corresponding path program 46 times [2022-01-31 21:42:34,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:34,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850754318] [2022-01-31 21:42:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:34,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:34,083 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:34,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:34,084 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:34,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:34,939 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 21:42:34,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:34,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850754318] [2022-01-31 21:42:34,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [850754318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:34,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:34,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:42:34,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823332609] [2022-01-31 21:42:34,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:34,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:42:34,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:42:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:42:34,941 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:36,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:36,400 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-01-31 21:42:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:42:36,400 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:42:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:36,401 INFO L225 Difference]: With dead ends: 67 [2022-01-31 21:42:36,401 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 21:42:36,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:42:36,401 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:36,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 21:42:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-01-31 21:42:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-01-31 21:42:36,406 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2022-01-31 21:42:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:36,406 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-01-31 21:42:36,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-01-31 21:42:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 21:42:36,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:36,407 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:36,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 21:42:36,407 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:36,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2012981002, now seen corresponding path program 46 times [2022-01-31 21:42:36,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:36,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72195009] [2022-01-31 21:42:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:36,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:36,408 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:36,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:36,409 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:37,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:37,300 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 21:42:37,300 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72195009] [2022-01-31 21:42:37,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [72195009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:37,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:37,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:42:37,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144165067] [2022-01-31 21:42:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:37,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:42:37,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:42:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:42:37,301 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:38,218 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-01-31 21:42:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:42:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 21:42:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:38,219 INFO L225 Difference]: With dead ends: 65 [2022-01-31 21:42:38,219 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 21:42:38,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:42:38,220 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:38,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 21:42:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 21:42:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-01-31 21:42:38,224 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 57 [2022-01-31 21:42:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:38,225 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-01-31 21:42:38,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-01-31 21:42:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 21:42:38,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:38,225 INFO L514 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:38,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 21:42:38,225 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:38,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2012932183, now seen corresponding path program 47 times [2022-01-31 21:42:38,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:38,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578016080] [2022-01-31 21:42:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:38,226 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:38,226 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:38,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:38,227 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:39,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:39,101 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 21:42:39,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578016080] [2022-01-31 21:42:39,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578016080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:39,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:39,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 21:42:39,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273663024] [2022-01-31 21:42:39,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:39,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 21:42:39,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 21:42:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:42:39,102 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:40,626 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-01-31 21:42:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:42:40,627 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 21:42:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:40,627 INFO L225 Difference]: With dead ends: 68 [2022-01-31 21:42:40,627 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 21:42:40,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:42:40,628 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:40,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 21:42:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-01-31 21:42:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-01-31 21:42:40,633 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2022-01-31 21:42:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:40,633 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-01-31 21:42:40,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:40,633 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-01-31 21:42:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:42:40,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:40,634 INFO L514 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:40,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 21:42:40,634 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2023614838, now seen corresponding path program 47 times [2022-01-31 21:42:40,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:40,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764750639] [2022-01-31 21:42:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:40,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:40,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:40,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:40,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:41,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:41,580 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 21:42:41,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:41,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764750639] [2022-01-31 21:42:41,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [764750639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:41,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:41,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 21:42:41,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923939675] [2022-01-31 21:42:41,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:41,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 21:42:41,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 21:42:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:42:41,595 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:42,557 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-01-31 21:42:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:42:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:42:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:42,558 INFO L225 Difference]: With dead ends: 66 [2022-01-31 21:42:42,558 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 21:42:42,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 1 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 21:42:42,558 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:42,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 21:42:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-31 21:42:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-01-31 21:42:42,563 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2022-01-31 21:42:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:42,563 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-01-31 21:42:42,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-01-31 21:42:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:42:42,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:42,564 INFO L514 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:42,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 21:42:42,564 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2023663657, now seen corresponding path program 48 times [2022-01-31 21:42:42,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:42,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691291751] [2022-01-31 21:42:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:42,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:42,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:42,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:42,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:43,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:43,472 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 21:42:43,472 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:43,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691291751] [2022-01-31 21:42:43,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [691291751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:43,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:43,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 21:42:43,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709467667] [2022-01-31 21:42:43,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:43,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 21:42:43,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 21:42:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 21:42:43,476 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:45,055 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-01-31 21:42:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 21:42:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:42:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:45,056 INFO L225 Difference]: With dead ends: 69 [2022-01-31 21:42:45,056 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 21:42:45,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 21:42:45,057 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:45,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 21:42:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-01-31 21:42:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-01-31 21:42:45,062 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2022-01-31 21:42:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:45,063 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-01-31 21:42:45,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:45,063 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-01-31 21:42:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:42:45,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:45,063 INFO L514 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:45,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 21:42:45,063 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1690933002, now seen corresponding path program 48 times [2022-01-31 21:42:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:45,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852403309] [2022-01-31 21:42:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:45,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:45,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:45,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:45,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:46,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:46,039 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 21:42:46,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:46,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852403309] [2022-01-31 21:42:46,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852403309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:46,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:46,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 21:42:46,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911485614] [2022-01-31 21:42:46,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:46,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 21:42:46,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 21:42:46,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 21:42:46,041 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:47,032 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-01-31 21:42:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 21:42:47,032 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 21:42:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:47,033 INFO L225 Difference]: With dead ends: 67 [2022-01-31 21:42:47,033 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 21:42:47,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 1 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 21:42:47,034 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:47,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 21:42:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-31 21:42:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-01-31 21:42:47,039 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 59 [2022-01-31 21:42:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:47,040 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-01-31 21:42:47,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-01-31 21:42:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:42:47,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:47,040 INFO L514 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:47,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 21:42:47,040 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1690884183, now seen corresponding path program 49 times [2022-01-31 21:42:47,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:47,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008975363] [2022-01-31 21:42:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:47,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:47,041 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:47,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:47,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:47,991 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 21:42:47,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:47,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008975363] [2022-01-31 21:42:47,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008975363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:47,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:47,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:42:47,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938956108] [2022-01-31 21:42:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:47,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:42:47,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:47,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:42:47,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:42:47,993 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:49,614 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-01-31 21:42:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 21:42:49,614 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 21:42:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:49,614 INFO L225 Difference]: With dead ends: 70 [2022-01-31 21:42:49,614 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 21:42:49,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:42:49,615 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:49,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 21:42:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-01-31 21:42:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-01-31 21:42:49,621 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2022-01-31 21:42:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:49,621 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-01-31 21:42:49,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-01-31 21:42:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:42:49,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:49,622 INFO L514 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:49,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 21:42:49,622 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:49,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash -877799050, now seen corresponding path program 49 times [2022-01-31 21:42:49,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:49,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263812090] [2022-01-31 21:42:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:49,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:49,623 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:49,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:49,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:50,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:50,621 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 21:42:50,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:50,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263812090] [2022-01-31 21:42:50,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263812090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:50,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:50,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:42:50,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993055996] [2022-01-31 21:42:50,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:50,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:42:50,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:42:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:42:50,622 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:51,637 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-01-31 21:42:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 21:42:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:42:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:51,638 INFO L225 Difference]: With dead ends: 68 [2022-01-31 21:42:51,638 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 21:42:51,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 1 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 21:42:51,640 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:51,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 21:42:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 21:42:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-01-31 21:42:51,645 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 60 [2022-01-31 21:42:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:51,645 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-01-31 21:42:51,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 52 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-01-31 21:42:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:42:51,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:51,645 INFO L514 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:51,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 21:42:51,645 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:51,646 INFO L85 PathProgramCache]: Analyzing trace with hash -877750231, now seen corresponding path program 50 times [2022-01-31 21:42:51,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:51,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845861318] [2022-01-31 21:42:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:51,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:51,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:51,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:51,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:52,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:52,625 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 21:42:52,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:52,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845861318] [2022-01-31 21:42:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845861318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:52,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:52,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 21:42:52,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306996400] [2022-01-31 21:42:52,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:52,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 21:42:52,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 21:42:52,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:42:52,627 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:54,326 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-01-31 21:42:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:42:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:42:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:54,326 INFO L225 Difference]: With dead ends: 71 [2022-01-31 21:42:54,326 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 21:42:54,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:42:54,327 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:54,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 21:42:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2022-01-31 21:42:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-01-31 21:42:54,332 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2022-01-31 21:42:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:54,332 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-01-31 21:42:54,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-01-31 21:42:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:42:54,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:54,333 INFO L514 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:54,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 21:42:54,333 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:54,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1440450314, now seen corresponding path program 50 times [2022-01-31 21:42:54,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:54,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217954534] [2022-01-31 21:42:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:54,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:54,334 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:54,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:54,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:55,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:42:55,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:55,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217954534] [2022-01-31 21:42:55,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217954534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:55,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:55,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 21:42:55,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507641185] [2022-01-31 21:42:55,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:55,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 21:42:55,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:55,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 21:42:55,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:42:55,360 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:56,438 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-01-31 21:42:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:42:56,439 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:42:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:56,439 INFO L225 Difference]: With dead ends: 69 [2022-01-31 21:42:56,439 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 21:42:56,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:42:56,441 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:56,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 21:42:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-01-31 21:42:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 61 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-01-31 21:42:56,446 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2022-01-31 21:42:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:56,446 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-01-31 21:42:56,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 53 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-01-31 21:42:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:42:56,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:56,446 INFO L514 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:56,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 21:42:56,446 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1440401495, now seen corresponding path program 51 times [2022-01-31 21:42:56,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:56,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268347618] [2022-01-31 21:42:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:56,447 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:56,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:56,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:56,448 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:57,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:42:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:42:57,461 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 21:42:57,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:42:57,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268347618] [2022-01-31 21:42:57,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [268347618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:42:57,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:42:57,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:42:57,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536706336] [2022-01-31 21:42:57,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:42:57,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:42:57,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:42:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:42:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:42:57,463 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:42:59,212 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-01-31 21:42:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 21:42:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:42:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:42:59,213 INFO L225 Difference]: With dead ends: 72 [2022-01-31 21:42:59,213 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 21:42:59,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:42:59,213 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:42:59,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:42:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 21:42:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-01-31 21:42:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-01-31 21:42:59,219 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2022-01-31 21:42:59,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:42:59,219 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-01-31 21:42:59,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:42:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-01-31 21:42:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:42:59,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:42:59,219 INFO L514 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:42:59,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 21:42:59,219 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:42:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:42:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1702770314, now seen corresponding path program 51 times [2022-01-31 21:42:59,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:42:59,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283115435] [2022-01-31 21:42:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:42:59,220 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:42:59,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:42:59,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:42:59,221 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:42:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:00,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:00,280 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 21:43:00,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:00,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283115435] [2022-01-31 21:43:00,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283115435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:00,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:00,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:43:00,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685846880] [2022-01-31 21:43:00,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:00,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:43:00,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:43:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:43:00,281 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:01,368 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-01-31 21:43:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 21:43:01,368 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:43:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:01,369 INFO L225 Difference]: With dead ends: 70 [2022-01-31 21:43:01,369 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 21:43:01,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 1 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 21:43:01,370 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:01,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 21:43:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-01-31 21:43:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-01-31 21:43:01,375 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 62 [2022-01-31 21:43:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:01,375 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-01-31 21:43:01,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 54 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-01-31 21:43:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:43:01,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:01,376 INFO L514 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:01,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 21:43:01,376 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1702721495, now seen corresponding path program 52 times [2022-01-31 21:43:01,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:01,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242994070] [2022-01-31 21:43:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:01,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:01,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:01,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:01,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:02,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:02,426 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 21:43:02,426 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:02,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242994070] [2022-01-31 21:43:02,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242994070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:02,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:02,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:43:02,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600613465] [2022-01-31 21:43:02,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:02,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:43:02,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:02,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:43:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:43:02,428 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:04,218 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-01-31 21:43:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 21:43:04,219 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:43:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:04,219 INFO L225 Difference]: With dead ends: 73 [2022-01-31 21:43:04,219 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 21:43:04,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4403, Invalid=7369, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:43:04,220 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:04,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 21:43:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-01-31 21:43:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-01-31 21:43:04,225 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2022-01-31 21:43:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:04,226 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-01-31 21:43:04,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-01-31 21:43:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:43:04,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:04,226 INFO L514 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:04,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 21:43:04,226 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:04,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1244755722, now seen corresponding path program 52 times [2022-01-31 21:43:04,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:04,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017896438] [2022-01-31 21:43:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:04,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:04,227 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:04,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:04,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:05,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:05,321 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 21:43:05,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:05,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017896438] [2022-01-31 21:43:05,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017896438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:05,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:05,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:43:05,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188715185] [2022-01-31 21:43:05,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:05,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:43:05,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:43:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:43:05,322 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:06,480 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-01-31 21:43:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 21:43:06,480 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:43:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:06,480 INFO L225 Difference]: With dead ends: 71 [2022-01-31 21:43:06,480 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 21:43:06,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:43:06,482 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:06,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 21:43:06,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-01-31 21:43:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 63 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-01-31 21:43:06,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 63 [2022-01-31 21:43:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:06,487 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-01-31 21:43:06,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 55 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-01-31 21:43:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:43:06,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:06,488 INFO L514 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:06,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 21:43:06,488 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:06,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1244706903, now seen corresponding path program 53 times [2022-01-31 21:43:06,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:06,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119098519] [2022-01-31 21:43:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:06,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:06,489 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:06,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:06,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:07,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:07,588 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 21:43:07,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119098519] [2022-01-31 21:43:07,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [119098519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:07,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:07,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:43:07,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201105829] [2022-01-31 21:43:07,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:07,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:43:07,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:43:07,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:43:07,590 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:09,485 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-01-31 21:43:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:43:09,486 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:43:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:09,486 INFO L225 Difference]: With dead ends: 74 [2022-01-31 21:43:09,486 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 21:43:09,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4567, Invalid=7643, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:43:09,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:09,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 21:43:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-01-31 21:43:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-01-31 21:43:09,493 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 63 [2022-01-31 21:43:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:09,493 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-01-31 21:43:09,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-01-31 21:43:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:43:09,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:09,494 INFO L514 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:09,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 21:43:09,494 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash 68794742, now seen corresponding path program 53 times [2022-01-31 21:43:09,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:09,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410711746] [2022-01-31 21:43:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:09,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:09,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:09,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:09,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:10,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:10,637 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 21:43:10,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410711746] [2022-01-31 21:43:10,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410711746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:10,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:10,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:43:10,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106986179] [2022-01-31 21:43:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:10,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:43:10,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:43:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:43:10,639 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:11,803 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-01-31 21:43:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:43:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:43:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:11,803 INFO L225 Difference]: With dead ends: 72 [2022-01-31 21:43:11,803 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 21:43:11,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:43:11,804 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:11,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 21:43:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-31 21:43:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-01-31 21:43:11,809 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2022-01-31 21:43:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:11,809 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-01-31 21:43:11,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 56 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-01-31 21:43:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:43:11,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:11,810 INFO L514 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:11,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 21:43:11,810 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:11,810 INFO L85 PathProgramCache]: Analyzing trace with hash 68843561, now seen corresponding path program 54 times [2022-01-31 21:43:11,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:11,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954614313] [2022-01-31 21:43:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:11,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:11,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:11,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:11,812 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:12,925 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 21:43:12,926 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:12,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954614313] [2022-01-31 21:43:12,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954614313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:12,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:12,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 21:43:12,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071354894] [2022-01-31 21:43:12,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:12,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 21:43:12,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:12,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 21:43:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:43:12,927 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:14,832 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-01-31 21:43:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:43:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:43:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:14,834 INFO L225 Difference]: With dead ends: 75 [2022-01-31 21:43:14,834 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 21:43:14,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4734, Invalid=7922, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 21:43:14,836 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:14,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 21:43:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-01-31 21:43:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-01-31 21:43:14,841 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2022-01-31 21:43:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:14,841 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-01-31 21:43:14,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-01-31 21:43:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:43:14,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:14,841 INFO L514 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:14,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 21:43:14,842 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:14,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2134153462, now seen corresponding path program 54 times [2022-01-31 21:43:14,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:14,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316737251] [2022-01-31 21:43:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:14,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:14,843 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:14,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:14,843 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:16,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:16,011 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 21:43:16,011 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:16,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316737251] [2022-01-31 21:43:16,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [316737251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:16,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:16,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 21:43:16,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350335821] [2022-01-31 21:43:16,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:16,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 21:43:16,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 21:43:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:43:16,012 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:17,215 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-01-31 21:43:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:43:17,215 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:43:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:17,215 INFO L225 Difference]: With dead ends: 73 [2022-01-31 21:43:17,215 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 21:43:17,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 21:43:17,217 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:17,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 21:43:17,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-01-31 21:43:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-01-31 21:43:17,223 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 65 [2022-01-31 21:43:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:17,223 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-01-31 21:43:17,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 57 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-01-31 21:43:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:43:17,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:17,224 INFO L514 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:17,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 21:43:17,224 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2134202281, now seen corresponding path program 55 times [2022-01-31 21:43:17,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:17,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151757297] [2022-01-31 21:43:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:17,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:17,225 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:17,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:17,225 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:18,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:18,387 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 21:43:18,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:18,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151757297] [2022-01-31 21:43:18,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151757297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:18,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:18,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:43:18,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407371521] [2022-01-31 21:43:18,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:18,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:43:18,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:43:18,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:43:18,389 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:20,349 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-01-31 21:43:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 21:43:20,349 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:43:20,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:20,350 INFO L225 Difference]: With dead ends: 76 [2022-01-31 21:43:20,350 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:43:20,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4904, Invalid=8206, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 21:43:20,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:20,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:43:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-01-31 21:43:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-01-31 21:43:20,356 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2022-01-31 21:43:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:20,356 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-01-31 21:43:20,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-01-31 21:43:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:43:20,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:20,356 INFO L514 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:20,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 21:43:20,357 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1735764342, now seen corresponding path program 55 times [2022-01-31 21:43:20,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:20,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720678368] [2022-01-31 21:43:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:20,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:20,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:20,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:20,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:21,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:21,558 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 21:43:21,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720678368] [2022-01-31 21:43:21,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720678368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:21,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:21,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:43:21,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080179] [2022-01-31 21:43:21,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:21,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:43:21,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:21,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:43:21,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:43:21,560 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:22,795 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-01-31 21:43:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 21:43:22,795 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:43:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:22,796 INFO L225 Difference]: With dead ends: 74 [2022-01-31 21:43:22,796 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 21:43:22,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 21:43:22,797 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:22,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 21:43:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-01-31 21:43:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-01-31 21:43:22,803 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 66 [2022-01-31 21:43:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:22,803 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-01-31 21:43:22,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 58 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-01-31 21:43:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:43:22,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:22,803 INFO L514 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:22,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 21:43:22,803 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1735813161, now seen corresponding path program 56 times [2022-01-31 21:43:22,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259410938] [2022-01-31 21:43:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:22,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:22,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:22,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:22,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:24,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:24,018 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 21:43:24,018 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:24,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259410938] [2022-01-31 21:43:24,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259410938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:24,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:24,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 21:43:24,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772717033] [2022-01-31 21:43:24,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:24,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 21:43:24,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 21:43:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:43:24,019 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:26,046 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-01-31 21:43:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:43:26,047 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:43:26,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:26,047 INFO L225 Difference]: With dead ends: 77 [2022-01-31 21:43:26,047 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 21:43:26,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5077, Invalid=8495, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:43:26,049 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:26,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:26,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 21:43:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-01-31 21:43:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-01-31 21:43:26,055 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2022-01-31 21:43:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:26,055 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-01-31 21:43:26,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-01-31 21:43:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:43:26,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:26,056 INFO L514 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:26,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 21:43:26,056 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2024363786, now seen corresponding path program 56 times [2022-01-31 21:43:26,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:26,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694828604] [2022-01-31 21:43:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:26,057 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:26,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:26,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:26,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:27,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:27,291 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 21:43:27,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:27,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694828604] [2022-01-31 21:43:27,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694828604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:27,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:27,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 21:43:27,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702958242] [2022-01-31 21:43:27,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:27,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 21:43:27,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 21:43:27,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:43:27,293 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:28,585 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-01-31 21:43:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:43:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 21:43:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:28,586 INFO L225 Difference]: With dead ends: 75 [2022-01-31 21:43:28,586 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 21:43:28,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 21:43:28,587 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:28,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:28,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 21:43:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-01-31 21:43:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 67 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-01-31 21:43:28,593 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2022-01-31 21:43:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:28,593 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-01-31 21:43:28,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 59 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-01-31 21:43:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:43:28,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:28,593 INFO L514 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:28,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 21:43:28,593 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2024314967, now seen corresponding path program 57 times [2022-01-31 21:43:28,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:28,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533342717] [2022-01-31 21:43:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:28,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:28,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:28,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:28,595 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:29,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:29,853 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 21:43:29,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533342717] [2022-01-31 21:43:29,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [533342717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:29,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:29,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:43:29,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729072638] [2022-01-31 21:43:29,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:29,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:43:29,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:29,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:43:29,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:43:29,854 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:31,963 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-01-31 21:43:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 21:43:31,964 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 21:43:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:31,964 INFO L225 Difference]: With dead ends: 78 [2022-01-31 21:43:31,964 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 21:43:31,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5253, Invalid=8789, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 21:43:31,965 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:31,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 21:43:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-01-31 21:43:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-01-31 21:43:31,971 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 67 [2022-01-31 21:43:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:31,971 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-01-31 21:43:31,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-01-31 21:43:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:43:31,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:31,971 INFO L514 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:31,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 21:43:31,972 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1670748534, now seen corresponding path program 57 times [2022-01-31 21:43:31,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:31,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638855587] [2022-01-31 21:43:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:31,973 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:31,973 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:31,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:31,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:33,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:33,255 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 21:43:33,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638855587] [2022-01-31 21:43:33,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638855587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:33,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:33,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:43:33,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47784068] [2022-01-31 21:43:33,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:33,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:43:33,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:33,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:43:33,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:43:33,256 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:34,602 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-01-31 21:43:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 21:43:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 21:43:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:34,602 INFO L225 Difference]: With dead ends: 76 [2022-01-31 21:43:34,602 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 21:43:34,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 21:43:34,603 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:34,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 21:43:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-31 21:43:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-01-31 21:43:34,609 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 68 [2022-01-31 21:43:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:34,609 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-01-31 21:43:34,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-01-31 21:43:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:43:34,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:34,609 INFO L514 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:34,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 21:43:34,609 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1670797353, now seen corresponding path program 58 times [2022-01-31 21:43:34,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:34,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504364435] [2022-01-31 21:43:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:34,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:34,611 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:34,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:34,611 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:35,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:35,879 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 21:43:35,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:35,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504364435] [2022-01-31 21:43:35,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504364435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:35,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:35,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:43:35,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100215451] [2022-01-31 21:43:35,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:35,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:43:35,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:35,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:43:35,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:43:35,880 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:38,042 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-01-31 21:43:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:43:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 21:43:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:38,042 INFO L225 Difference]: With dead ends: 79 [2022-01-31 21:43:38,042 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 21:43:38,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5432, Invalid=9088, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 21:43:38,043 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:38,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 21:43:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-01-31 21:43:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-01-31 21:43:38,049 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2022-01-31 21:43:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:38,049 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-01-31 21:43:38,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-01-31 21:43:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:43:38,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:38,049 INFO L514 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:38,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 21:43:38,050 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash 255113462, now seen corresponding path program 58 times [2022-01-31 21:43:38,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:38,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463932169] [2022-01-31 21:43:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:38,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:38,051 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:38,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:38,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:39,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:39,375 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 21:43:39,375 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463932169] [2022-01-31 21:43:39,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [463932169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:39,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:39,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:43:39,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466020536] [2022-01-31 21:43:39,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:39,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:43:39,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:43:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:43:39,376 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:40,775 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-01-31 21:43:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:43:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:43:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:40,776 INFO L225 Difference]: With dead ends: 77 [2022-01-31 21:43:40,776 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 21:43:40,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 21:43:40,777 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:40,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 21:43:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-01-31 21:43:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-01-31 21:43:40,782 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 69 [2022-01-31 21:43:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:40,782 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-01-31 21:43:40,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 61 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-01-31 21:43:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:43:40,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:40,783 INFO L514 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:40,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 21:43:40,783 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:40,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:40,783 INFO L85 PathProgramCache]: Analyzing trace with hash 255162281, now seen corresponding path program 59 times [2022-01-31 21:43:40,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:40,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754749117] [2022-01-31 21:43:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:40,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:40,784 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:40,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:40,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:43:42,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:42,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754749117] [2022-01-31 21:43:42,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [754749117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:42,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:42,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:43:42,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418499856] [2022-01-31 21:43:42,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:42,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:43:42,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:43:42,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:43:42,129 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:44,394 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-01-31 21:43:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:43:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:43:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:44,395 INFO L225 Difference]: With dead ends: 80 [2022-01-31 21:43:44,395 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 21:43:44,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5614, Invalid=9392, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:43:44,396 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:44,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 21:43:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-01-31 21:43:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-01-31 21:43:44,401 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2022-01-31 21:43:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:44,401 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-01-31 21:43:44,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-01-31 21:43:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:43:44,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:44,402 INFO L514 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:44,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 21:43:44,402 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:44,402 INFO L85 PathProgramCache]: Analyzing trace with hash -679900810, now seen corresponding path program 59 times [2022-01-31 21:43:44,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:44,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615914743] [2022-01-31 21:43:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:44,403 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:44,403 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:44,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:44,404 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:45,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:45,758 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 21:43:45,758 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:45,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615914743] [2022-01-31 21:43:45,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615914743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:45,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:45,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:43:45,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961036820] [2022-01-31 21:43:45,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:45,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:43:45,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:45,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:43:45,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:43:45,759 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:47,159 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-01-31 21:43:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:43:47,160 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:43:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:47,160 INFO L225 Difference]: With dead ends: 78 [2022-01-31 21:43:47,160 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:43:47,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:43:47,162 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:47,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:47,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:43:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-01-31 21:43:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-01-31 21:43:47,167 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2022-01-31 21:43:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:47,168 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-01-31 21:43:47,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 62 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-01-31 21:43:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:43:47,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:47,168 INFO L514 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:47,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 21:43:47,168 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:47,168 INFO L85 PathProgramCache]: Analyzing trace with hash -679851991, now seen corresponding path program 60 times [2022-01-31 21:43:47,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:47,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170450411] [2022-01-31 21:43:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:47,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:47,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:47,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:47,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:48,537 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 21:43:48,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:48,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170450411] [2022-01-31 21:43:48,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1170450411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:48,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:48,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 21:43:48,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191769503] [2022-01-31 21:43:48,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:48,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 21:43:48,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:48,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 21:43:48,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:43:48,538 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:50,827 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2022-01-31 21:43:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:43:50,827 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:43:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:50,828 INFO L225 Difference]: With dead ends: 81 [2022-01-31 21:43:50,828 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 21:43:50,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5799, Invalid=9701, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 21:43:50,829 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:50,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 21:43:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-01-31 21:43:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-01-31 21:43:50,835 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2022-01-31 21:43:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:50,835 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-01-31 21:43:50,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-01-31 21:43:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:43:50,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:50,835 INFO L514 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:50,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 21:43:50,835 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash 399427830, now seen corresponding path program 60 times [2022-01-31 21:43:50,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:50,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492537710] [2022-01-31 21:43:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:50,836 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:50,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:50,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:50,837 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:52,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:52,236 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 21:43:52,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:52,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492537710] [2022-01-31 21:43:52,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492537710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:52,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:52,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 21:43:52,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700679281] [2022-01-31 21:43:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:52,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 21:43:52,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 21:43:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:43:52,237 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:53,707 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-01-31 21:43:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:43:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:43:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:53,708 INFO L225 Difference]: With dead ends: 79 [2022-01-31 21:43:53,708 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 21:43:53,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 21:43:53,709 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:53,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 21:43:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-01-31 21:43:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 71 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-01-31 21:43:53,715 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 71 [2022-01-31 21:43:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:53,715 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-01-31 21:43:53,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 63 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-01-31 21:43:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:43:53,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:53,715 INFO L514 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:53,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 21:43:53,715 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 399476649, now seen corresponding path program 61 times [2022-01-31 21:43:53,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:53,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834121048] [2022-01-31 21:43:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:53,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:53,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:53,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:53,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:55,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:55,117 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 21:43:55,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:55,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834121048] [2022-01-31 21:43:55,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834121048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:55,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:55,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:43:55,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316737738] [2022-01-31 21:43:55,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:55,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:43:55,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:43:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:43:55,118 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:43:57,485 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-01-31 21:43:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 21:43:57,486 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:43:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:43:57,486 INFO L225 Difference]: With dead ends: 82 [2022-01-31 21:43:57,486 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 21:43:57,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5987, Invalid=10015, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:43:57,487 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:43:57,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:43:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 21:43:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-01-31 21:43:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-01-31 21:43:57,493 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2022-01-31 21:43:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:43:57,493 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-01-31 21:43:57,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:43:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-01-31 21:43:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:43:57,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:43:57,493 INFO L514 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:43:57,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 21:43:57,493 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:43:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:43:57,494 INFO L85 PathProgramCache]: Analyzing trace with hash -501122698, now seen corresponding path program 61 times [2022-01-31 21:43:57,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:43:57,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425741543] [2022-01-31 21:43:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:43:57,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:43:57,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:43:57,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:43:57,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:43:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:58,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:43:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:43:58,925 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 21:43:58,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:43:58,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425741543] [2022-01-31 21:43:58,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [425741543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:43:58,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:43:58,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:43:58,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552631423] [2022-01-31 21:43:58,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:43:58,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:43:58,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:43:58,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:43:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:43:58,926 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:00,419 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-01-31 21:44:00,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 21:44:00,420 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:44:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:00,420 INFO L225 Difference]: With dead ends: 80 [2022-01-31 21:44:00,420 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 21:44:00,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:44:00,421 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:00,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 21:44:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-01-31 21:44:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-01-31 21:44:00,427 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 72 [2022-01-31 21:44:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:00,427 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-01-31 21:44:00,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 64 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-01-31 21:44:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:44:00,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:00,428 INFO L514 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:00,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 21:44:00,428 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash -501073879, now seen corresponding path program 62 times [2022-01-31 21:44:00,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:00,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819400650] [2022-01-31 21:44:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:00,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:00,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:00,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:00,430 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:44:01,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:01,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819400650] [2022-01-31 21:44:01,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [819400650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:01,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:01,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 21:44:01,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245147505] [2022-01-31 21:44:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:01,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 21:44:01,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 21:44:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:44:01,860 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:04,258 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2022-01-31 21:44:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:44:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:44:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:04,259 INFO L225 Difference]: With dead ends: 83 [2022-01-31 21:44:04,259 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 21:44:04,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6178, Invalid=10334, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:44:04,260 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:04,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 21:44:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-01-31 21:44:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-01-31 21:44:04,265 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2022-01-31 21:44:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:04,266 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-01-31 21:44:04,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:04,266 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-01-31 21:44:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:44:04,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:04,266 INFO L514 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:04,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 21:44:04,266 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:04,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1646582006, now seen corresponding path program 62 times [2022-01-31 21:44:04,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:04,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835732474] [2022-01-31 21:44:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:04,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:04,267 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:04,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:04,268 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:05,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:05,740 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 21:44:05,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:05,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835732474] [2022-01-31 21:44:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [835732474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:05,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:05,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 21:44:05,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642889767] [2022-01-31 21:44:05,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:05,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 21:44:05,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 21:44:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:44:05,742 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:07,312 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2022-01-31 21:44:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:44:07,312 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:44:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:07,313 INFO L225 Difference]: With dead ends: 81 [2022-01-31 21:44:07,313 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 21:44:07,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 21:44:07,314 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:07,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:07,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 21:44:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-31 21:44:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-01-31 21:44:07,320 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2022-01-31 21:44:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:07,320 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-01-31 21:44:07,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 65 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-01-31 21:44:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:44:07,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:07,321 INFO L514 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:07,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 21:44:07,321 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1646630825, now seen corresponding path program 63 times [2022-01-31 21:44:07,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:07,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15454666] [2022-01-31 21:44:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:07,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:07,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:07,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:07,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:08,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:08,849 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 21:44:08,849 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:08,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15454666] [2022-01-31 21:44:08,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [15454666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:08,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:08,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:44:08,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555903213] [2022-01-31 21:44:08,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:08,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:44:08,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:44:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:44:08,850 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:11,327 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-01-31 21:44:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 21:44:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:44:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:11,328 INFO L225 Difference]: With dead ends: 84 [2022-01-31 21:44:11,328 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 21:44:11,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6372, Invalid=10658, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:44:11,329 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:11,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 21:44:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-01-31 21:44:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-01-31 21:44:11,335 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2022-01-31 21:44:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:11,335 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-01-31 21:44:11,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-01-31 21:44:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:44:11,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:11,336 INFO L514 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:11,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 21:44:11,336 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash -494048906, now seen corresponding path program 63 times [2022-01-31 21:44:11,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:11,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883729559] [2022-01-31 21:44:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:11,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:11,337 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:11,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:11,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:12,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:12,857 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 21:44:12,857 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:12,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883729559] [2022-01-31 21:44:12,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [883729559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:12,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:12,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:44:12,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981091459] [2022-01-31 21:44:12,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:12,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:44:12,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:44:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:44:12,859 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:14,427 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-01-31 21:44:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 21:44:14,427 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:44:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:14,428 INFO L225 Difference]: With dead ends: 82 [2022-01-31 21:44:14,428 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 21:44:14,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:44:14,430 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:14,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 21:44:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-01-31 21:44:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 74 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-01-31 21:44:14,436 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 74 [2022-01-31 21:44:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:14,436 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-01-31 21:44:14,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-01-31 21:44:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:44:14,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:14,436 INFO L514 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:14,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 21:44:14,436 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash -494000087, now seen corresponding path program 64 times [2022-01-31 21:44:14,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:14,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221781451] [2022-01-31 21:44:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:14,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:14,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:14,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:14,438 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:15,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:15,959 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 21:44:15,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221781451] [2022-01-31 21:44:15,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [221781451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:15,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:15,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:44:15,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431840037] [2022-01-31 21:44:15,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:15,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:44:15,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:44:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:44:15,960 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:18,512 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-01-31 21:44:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:44:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:44:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:18,515 INFO L225 Difference]: With dead ends: 85 [2022-01-31 21:44:18,515 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 21:44:18,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6569, Invalid=10987, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 21:44:18,516 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:18,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 21:44:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2022-01-31 21:44:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.04) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-01-31 21:44:18,523 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2022-01-31 21:44:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:18,523 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-01-31 21:44:18,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-01-31 21:44:18,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 21:44:18,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:18,523 INFO L514 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:18,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 21:44:18,524 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1865869558, now seen corresponding path program 64 times [2022-01-31 21:44:18,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:18,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104970374] [2022-01-31 21:44:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:18,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:18,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:18,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:18,525 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:20,088 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 21:44:20,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:20,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104970374] [2022-01-31 21:44:20,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104970374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:20,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:20,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:44:20,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653129513] [2022-01-31 21:44:20,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:20,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:44:20,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:20,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:44:20,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:44:20,090 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:21,725 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2022-01-31 21:44:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:44:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:44:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:21,726 INFO L225 Difference]: With dead ends: 83 [2022-01-31 21:44:21,726 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 21:44:21,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 1 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 21:44:21,727 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:21,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 21:44:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-01-31 21:44:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-01-31 21:44:21,734 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 75 [2022-01-31 21:44:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:21,734 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-01-31 21:44:21,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 67 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-01-31 21:44:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 21:44:21,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:21,734 INFO L514 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:21,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 21:44:21,734 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:21,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1865918377, now seen corresponding path program 65 times [2022-01-31 21:44:21,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:21,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743194213] [2022-01-31 21:44:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:21,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:21,736 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:21,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:21,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:23,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:23,307 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 21:44:23,307 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:23,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743194213] [2022-01-31 21:44:23,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743194213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:23,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:23,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:44:23,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746102814] [2022-01-31 21:44:23,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:23,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:44:23,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:44:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:44:23,309 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:25,928 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-01-31 21:44:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:44:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:44:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:25,929 INFO L225 Difference]: With dead ends: 86 [2022-01-31 21:44:25,929 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 21:44:25,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6769, Invalid=11321, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:44:25,929 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:25,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 21:44:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-01-31 21:44:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-01-31 21:44:25,936 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2022-01-31 21:44:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:25,936 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-01-31 21:44:25,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-01-31 21:44:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:44:25,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:25,936 INFO L514 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:25,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 21:44:25,936 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2008897910, now seen corresponding path program 65 times [2022-01-31 21:44:25,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:25,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068854805] [2022-01-31 21:44:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:25,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:25,937 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:25,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:25,938 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:27,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:27,608 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 21:44:27,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:27,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068854805] [2022-01-31 21:44:27,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068854805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:27,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:27,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:44:27,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274691522] [2022-01-31 21:44:27,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:27,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:44:27,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:44:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:44:27,610 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:29,287 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-01-31 21:44:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:44:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:44:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:29,292 INFO L225 Difference]: With dead ends: 84 [2022-01-31 21:44:29,292 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 21:44:29,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:44:29,293 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:29,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 21:44:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-01-31 21:44:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-01-31 21:44:29,299 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2022-01-31 21:44:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:29,299 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-01-31 21:44:29,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 68 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-01-31 21:44:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:44:29,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:29,300 INFO L514 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:29,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 21:44:29,300 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2008946729, now seen corresponding path program 66 times [2022-01-31 21:44:29,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373000403] [2022-01-31 21:44:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:29,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:29,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:29,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:29,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:30,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:30,904 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 21:44:30,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:30,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373000403] [2022-01-31 21:44:30,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373000403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:30,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:30,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 21:44:30,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225234856] [2022-01-31 21:44:30,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:30,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 21:44:30,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 21:44:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:44:30,912 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:33,599 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2022-01-31 21:44:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:44:33,600 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:44:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:33,600 INFO L225 Difference]: With dead ends: 87 [2022-01-31 21:44:33,600 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 21:44:33,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6972, Invalid=11660, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 21:44:33,601 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:33,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 21:44:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2022-01-31 21:44:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-01-31 21:44:33,607 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2022-01-31 21:44:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:33,608 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-01-31 21:44:33,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-01-31 21:44:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:44:33,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:33,608 INFO L514 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:33,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 21:44:33,608 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2147157770, now seen corresponding path program 66 times [2022-01-31 21:44:33,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:33,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920357465] [2022-01-31 21:44:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:33,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:33,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:33,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:33,610 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:35,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:35,255 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 21:44:35,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:35,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920357465] [2022-01-31 21:44:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920357465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:35,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 21:44:35,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851216741] [2022-01-31 21:44:35,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 21:44:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 21:44:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:44:35,256 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:36,980 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-01-31 21:44:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:44:36,981 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:44:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:36,981 INFO L225 Difference]: With dead ends: 85 [2022-01-31 21:44:36,981 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 21:44:36,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 21:44:36,983 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:36,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:36,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 21:44:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-01-31 21:44:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 77 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-01-31 21:44:37,005 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 77 [2022-01-31 21:44:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-01-31 21:44:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 69 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-01-31 21:44:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:44:37,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:37,005 INFO L514 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:37,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 21:44:37,005 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:37,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2147108951, now seen corresponding path program 67 times [2022-01-31 21:44:37,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:37,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941968956] [2022-01-31 21:44:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:37,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:37,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:37,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:37,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:38,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:38,653 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 21:44:38,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:38,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941968956] [2022-01-31 21:44:38,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [941968956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:38,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:38,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:44:38,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609839011] [2022-01-31 21:44:38,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:38,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:44:38,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:38,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:44:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:44:38,655 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:41,396 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-01-31 21:44:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 21:44:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:44:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:41,396 INFO L225 Difference]: With dead ends: 88 [2022-01-31 21:44:41,396 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 21:44:41,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7178, Invalid=12004, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:44:41,398 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:41,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 21:44:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-01-31 21:44:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-01-31 21:44:41,404 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 77 [2022-01-31 21:44:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:41,404 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-01-31 21:44:41,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:41,404 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-01-31 21:44:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:44:41,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:41,405 INFO L514 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:41,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 21:44:41,405 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:41,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2135864970, now seen corresponding path program 67 times [2022-01-31 21:44:41,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:41,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063112731] [2022-01-31 21:44:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:41,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:41,406 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:41,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:41,406 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:43,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:43,107 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 21:44:43,107 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:43,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063112731] [2022-01-31 21:44:43,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063112731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:43,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:43,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:44:43,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712703067] [2022-01-31 21:44:43,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:43,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:44:43,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:44:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:44:43,109 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:44,880 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-01-31 21:44:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 21:44:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:44:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:44,881 INFO L225 Difference]: With dead ends: 86 [2022-01-31 21:44:44,881 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 21:44:44,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:44:44,883 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:44,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 21:44:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-01-31 21:44:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-01-31 21:44:44,889 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 78 [2022-01-31 21:44:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:44,889 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-01-31 21:44:44,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-01-31 21:44:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:44:44,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:44,890 INFO L514 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:44,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 21:44:44,890 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2135816151, now seen corresponding path program 68 times [2022-01-31 21:44:44,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:44,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497054203] [2022-01-31 21:44:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:44,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:44,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:44,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:44,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:46,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:46,587 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 21:44:46,587 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497054203] [2022-01-31 21:44:46,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [497054203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:46,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:46,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 21:44:46,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899493055] [2022-01-31 21:44:46,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:46,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 21:44:46,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:46,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 21:44:46,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:44:46,589 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:49,425 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-01-31 21:44:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:44:49,425 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:44:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:49,426 INFO L225 Difference]: With dead ends: 89 [2022-01-31 21:44:49,426 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 21:44:49,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7387, Invalid=12353, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:44:49,427 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:49,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 21:44:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-01-31 21:44:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 80 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-01-31 21:44:49,434 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2022-01-31 21:44:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:49,434 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-01-31 21:44:49,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-01-31 21:44:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:44:49,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:49,434 INFO L514 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:49,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 21:44:49,434 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1785788170, now seen corresponding path program 68 times [2022-01-31 21:44:49,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:49,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836593823] [2022-01-31 21:44:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:49,435 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:49,435 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:49,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:49,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:51,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:51,204 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 21:44:51,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836593823] [2022-01-31 21:44:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836593823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:51,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:51,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 21:44:51,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646367159] [2022-01-31 21:44:51,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:51,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 21:44:51,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:51,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 21:44:51,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:44:51,205 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:53,073 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2022-01-31 21:44:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:44:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:44:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:53,073 INFO L225 Difference]: With dead ends: 87 [2022-01-31 21:44:53,073 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 21:44:53,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:44:53,074 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:53,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 21:44:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-31 21:44:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 79 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-01-31 21:44:53,081 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2022-01-31 21:44:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:53,081 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-01-31 21:44:53,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 71 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-01-31 21:44:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:44:53,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:53,081 INFO L514 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:53,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 21:44:53,081 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1785739351, now seen corresponding path program 69 times [2022-01-31 21:44:53,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:53,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526014212] [2022-01-31 21:44:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:53,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:53,083 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:53,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:53,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:54,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:54,849 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 21:44:54,849 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526014212] [2022-01-31 21:44:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526014212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:54,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:54,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:44:54,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844439463] [2022-01-31 21:44:54,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:54,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:44:54,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:54,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:44:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:44:54,861 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:44:57,795 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-01-31 21:44:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 21:44:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:44:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:44:57,796 INFO L225 Difference]: With dead ends: 90 [2022-01-31 21:44:57,796 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 21:44:57,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2551 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7599, Invalid=12707, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:44:57,798 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:44:57,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:44:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 21:44:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-01-31 21:44:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-01-31 21:44:57,804 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2022-01-31 21:44:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:44:57,804 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-01-31 21:44:57,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:44:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-01-31 21:44:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:44:57,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:44:57,804 INFO L514 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:44:57,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 21:44:57,805 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:44:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:44:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash 476658038, now seen corresponding path program 69 times [2022-01-31 21:44:57,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:44:57,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938174223] [2022-01-31 21:44:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:44:57,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:44:57,806 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:44:57,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:44:57,806 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:44:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:59,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:44:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:44:59,606 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 21:44:59,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:44:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938174223] [2022-01-31 21:44:59,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1938174223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:44:59,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:44:59,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:44:59,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669043475] [2022-01-31 21:44:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:44:59,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:44:59,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:44:59,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:44:59,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:44:59,608 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:01,503 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-01-31 21:45:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 21:45:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:45:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:01,503 INFO L225 Difference]: With dead ends: 88 [2022-01-31 21:45:01,503 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 21:45:01,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:45:01,505 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:01,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 21:45:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-31 21:45:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-01-31 21:45:01,511 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 80 [2022-01-31 21:45:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:01,511 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-01-31 21:45:01,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 72 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-01-31 21:45:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:45:01,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:01,512 INFO L514 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:01,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 21:45:01,512 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash 476706857, now seen corresponding path program 70 times [2022-01-31 21:45:01,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594493161] [2022-01-31 21:45:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:01,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:01,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:01,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:01,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:03,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:03,308 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 21:45:03,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:03,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594493161] [2022-01-31 21:45:03,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [594493161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:03,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:03,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:45:03,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446987596] [2022-01-31 21:45:03,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:03,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:45:03,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:45:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:45:03,310 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:06,306 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-01-31 21:45:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:45:06,306 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:45:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:06,307 INFO L225 Difference]: With dead ends: 91 [2022-01-31 21:45:06,307 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 21:45:06,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2623 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7814, Invalid=13066, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 21:45:06,308 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:06,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 21:45:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-01-31 21:45:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-01-31 21:45:06,314 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2022-01-31 21:45:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:06,315 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-01-31 21:45:06,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-01-31 21:45:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:45:06,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:06,315 INFO L514 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:06,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 21:45:06,315 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:06,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1893013750, now seen corresponding path program 70 times [2022-01-31 21:45:06,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:06,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756739025] [2022-01-31 21:45:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:06,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:06,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:06,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:06,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:08,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:08,156 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 21:45:08,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:08,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756739025] [2022-01-31 21:45:08,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [756739025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:08,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:08,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:45:08,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264488323] [2022-01-31 21:45:08,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:08,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:45:08,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:08,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:45:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:45:08,158 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:10,110 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-01-31 21:45:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:45:10,110 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:45:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:10,111 INFO L225 Difference]: With dead ends: 89 [2022-01-31 21:45:10,111 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 21:45:10,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 21:45:10,112 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:10,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 21:45:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-01-31 21:45:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 81 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-01-31 21:45:10,118 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 81 [2022-01-31 21:45:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:10,119 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-01-31 21:45:10,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-01-31 21:45:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:45:10,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:10,119 INFO L514 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:10,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 21:45:10,119 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1893062569, now seen corresponding path program 71 times [2022-01-31 21:45:10,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:10,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817781063] [2022-01-31 21:45:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:10,120 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:10,120 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:10,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:10,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:11,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:11,949 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 21:45:11,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817781063] [2022-01-31 21:45:11,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817781063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:11,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:11,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:45:11,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559657440] [2022-01-31 21:45:11,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:11,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:45:11,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:45:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:45:11,951 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:15,015 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-01-31 21:45:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:45:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:45:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:15,016 INFO L225 Difference]: With dead ends: 92 [2022-01-31 21:45:15,016 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 21:45:15,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8032, Invalid=13430, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:45:15,017 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:15,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 21:45:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-01-31 21:45:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-01-31 21:45:15,024 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2022-01-31 21:45:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:15,024 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-01-31 21:45:15,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-01-31 21:45:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:45:15,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:15,025 INFO L514 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:15,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 21:45:15,025 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1444599434, now seen corresponding path program 71 times [2022-01-31 21:45:15,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:15,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443843388] [2022-01-31 21:45:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:15,026 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:15,026 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:15,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:15,026 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:16,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:16,949 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 21:45:16,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:16,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443843388] [2022-01-31 21:45:16,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [443843388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:16,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:16,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:45:16,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910941311] [2022-01-31 21:45:16,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:16,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:45:16,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:45:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:45:16,951 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:18,943 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-01-31 21:45:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:45:18,944 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:45:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:18,944 INFO L225 Difference]: With dead ends: 90 [2022-01-31 21:45:18,944 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 21:45:18,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:45:18,945 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:18,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 21:45:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-31 21:45:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 82 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-01-31 21:45:18,952 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2022-01-31 21:45:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:18,952 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-01-31 21:45:18,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 74 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-01-31 21:45:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:45:18,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:18,953 INFO L514 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:18,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 21:45:18,953 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:18,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1444550615, now seen corresponding path program 72 times [2022-01-31 21:45:18,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:18,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810546398] [2022-01-31 21:45:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:18,954 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:18,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:18,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:18,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:20,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:20,888 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 21:45:20,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:20,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810546398] [2022-01-31 21:45:20,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1810546398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:20,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:20,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 21:45:20,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021224414] [2022-01-31 21:45:20,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:20,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 21:45:20,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:20,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 21:45:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:45:20,890 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:24,057 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-01-31 21:45:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 21:45:24,057 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:45:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:24,057 INFO L225 Difference]: With dead ends: 93 [2022-01-31 21:45:24,057 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 21:45:24,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8253, Invalid=13799, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 21:45:24,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:24,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 21:45:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-01-31 21:45:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 84 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-01-31 21:45:24,065 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 82 [2022-01-31 21:45:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:24,065 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-01-31 21:45:24,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-01-31 21:45:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:45:24,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:24,065 INFO L514 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:24,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 21:45:24,066 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1831393034, now seen corresponding path program 72 times [2022-01-31 21:45:24,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:24,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424930956] [2022-01-31 21:45:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:24,067 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:24,067 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:24,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:24,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:25,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:25,992 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 21:45:25,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:25,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424930956] [2022-01-31 21:45:25,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1424930956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:25,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:25,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 21:45:25,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272150422] [2022-01-31 21:45:25,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:25,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 21:45:25,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:25,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 21:45:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:45:25,994 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:27,987 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-01-31 21:45:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 21:45:27,988 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:45:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:27,988 INFO L225 Difference]: With dead ends: 91 [2022-01-31 21:45:27,988 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 21:45:27,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 21:45:27,990 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:27,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 21:45:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-01-31 21:45:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-01-31 21:45:27,996 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 83 [2022-01-31 21:45:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:27,996 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-01-31 21:45:27,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-01-31 21:45:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:45:27,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:27,997 INFO L514 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:27,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 21:45:27,997 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:27,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1831344215, now seen corresponding path program 73 times [2022-01-31 21:45:27,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:27,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313707346] [2022-01-31 21:45:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:27,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:27,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:27,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:27,999 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:45:29,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313707346] [2022-01-31 21:45:29,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313707346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:29,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:29,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:45:29,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124342353] [2022-01-31 21:45:29,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:29,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:45:29,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:45:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:45:29,924 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:33,123 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-01-31 21:45:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 21:45:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:45:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:33,123 INFO L225 Difference]: With dead ends: 94 [2022-01-31 21:45:33,123 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 21:45:33,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8477, Invalid=14173, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:45:33,125 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:33,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 21:45:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-01-31 21:45:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 85 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-01-31 21:45:33,132 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 83 [2022-01-31 21:45:33,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:33,132 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-01-31 21:45:33,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:33,132 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-01-31 21:45:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 21:45:33,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:33,132 INFO L514 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:33,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 21:45:33,132 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash -937092746, now seen corresponding path program 73 times [2022-01-31 21:45:33,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:33,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959935587] [2022-01-31 21:45:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:33,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:33,134 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:33,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:33,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:35,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:35,106 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 21:45:35,106 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:35,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959935587] [2022-01-31 21:45:35,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959935587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:35,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:35,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:45:35,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817747810] [2022-01-31 21:45:35,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:35,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:45:35,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:35,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:45:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:45:35,108 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:37,170 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-01-31 21:45:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 21:45:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 21:45:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:37,171 INFO L225 Difference]: With dead ends: 92 [2022-01-31 21:45:37,171 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 21:45:37,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:45:37,172 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:37,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 21:45:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-01-31 21:45:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-01-31 21:45:37,179 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 84 [2022-01-31 21:45:37,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:37,179 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-01-31 21:45:37,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 76 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-01-31 21:45:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 21:45:37,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:37,179 INFO L514 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:37,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 21:45:37,179 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -937043927, now seen corresponding path program 74 times [2022-01-31 21:45:37,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:37,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511872272] [2022-01-31 21:45:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:37,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:37,180 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:37,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:37,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:39,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:39,152 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 21:45:39,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511872272] [2022-01-31 21:45:39,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511872272] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:39,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:39,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 21:45:39,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591702984] [2022-01-31 21:45:39,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:39,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 21:45:39,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:39,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 21:45:39,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=3152, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:45:39,153 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:42,447 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-01-31 21:45:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:45:42,447 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 21:45:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:42,447 INFO L225 Difference]: With dead ends: 95 [2022-01-31 21:45:42,447 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 21:45:42,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8704, Invalid=14552, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:45:42,449 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:42,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:42,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 21:45:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-01-31 21:45:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.035294117647059) internal successors, (88), 86 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-01-31 21:45:42,455 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2022-01-31 21:45:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:42,456 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-01-31 21:45:42,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-01-31 21:45:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 21:45:42,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:42,456 INFO L514 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:42,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 21:45:42,456 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1016412406, now seen corresponding path program 74 times [2022-01-31 21:45:42,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445495072] [2022-01-31 21:45:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:42,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:42,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:42,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:42,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:44,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:44,478 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 21:45:44,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:44,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445495072] [2022-01-31 21:45:44,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1445495072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:44,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:44,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 21:45:44,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646711741] [2022-01-31 21:45:44,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:44,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 21:45:44,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:44,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 21:45:44,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:45:44,479 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:46,590 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-01-31 21:45:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:45:46,591 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 21:45:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:46,591 INFO L225 Difference]: With dead ends: 93 [2022-01-31 21:45:46,591 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 21:45:46,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:45:46,592 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:46,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 21:45:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-01-31 21:45:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 85 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-01-31 21:45:46,599 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2022-01-31 21:45:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:46,599 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-01-31 21:45:46,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 77 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-01-31 21:45:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 21:45:46,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:46,599 INFO L514 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:46,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 21:45:46,600 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1016461225, now seen corresponding path program 75 times [2022-01-31 21:45:46,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:46,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095123716] [2022-01-31 21:45:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:46,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:46,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:46,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:46,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:48,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:48,618 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 21:45:48,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095123716] [2022-01-31 21:45:48,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095123716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:48,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:48,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 21:45:48,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411162182] [2022-01-31 21:45:48,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:48,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 21:45:48,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:48,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 21:45:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:45:48,620 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:52,003 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-01-31 21:45:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 21:45:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 21:45:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:52,003 INFO L225 Difference]: With dead ends: 96 [2022-01-31 21:45:52,003 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 21:45:52,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8934, Invalid=14936, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 21:45:52,005 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:52,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 21:45:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-01-31 21:45:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-01-31 21:45:52,012 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2022-01-31 21:45:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:52,012 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-01-31 21:45:52,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-01-31 21:45:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:45:52,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:52,012 INFO L514 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:52,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 21:45:52,012 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:52,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1445529974, now seen corresponding path program 75 times [2022-01-31 21:45:52,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:52,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245827954] [2022-01-31 21:45:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:52,013 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:52,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:52,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:52,014 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:54,109 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 21:45:54,109 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:54,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245827954] [2022-01-31 21:45:54,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245827954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:54,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:54,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 21:45:54,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478071460] [2022-01-31 21:45:54,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:54,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 21:45:54,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 21:45:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:45:54,111 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:45:56,287 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-01-31 21:45:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 21:45:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 21:45:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:45:56,288 INFO L225 Difference]: With dead ends: 94 [2022-01-31 21:45:56,288 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 21:45:56,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 21:45:56,289 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:45:56,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:45:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 21:45:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-01-31 21:45:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-01-31 21:45:56,296 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 86 [2022-01-31 21:45:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:45:56,296 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-01-31 21:45:56,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 78 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:45:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-01-31 21:45:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 21:45:56,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:45:56,296 INFO L514 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:45:56,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 21:45:56,296 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:45:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:45:56,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1445578793, now seen corresponding path program 76 times [2022-01-31 21:45:56,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:45:56,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628352961] [2022-01-31 21:45:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:45:56,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:45:56,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:45:56,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:45:56,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:45:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:58,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:45:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:45:58,374 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 21:45:58,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:45:58,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628352961] [2022-01-31 21:45:58,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [628352961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:45:58,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:45:58,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:45:58,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551026337] [2022-01-31 21:45:58,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:45:58,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:45:58,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:45:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:45:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=3313, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:45:58,375 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:01,862 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2022-01-31 21:46:01,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 21:46:01,862 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 21:46:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:01,863 INFO L225 Difference]: With dead ends: 97 [2022-01-31 21:46:01,863 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 21:46:01,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=9167, Invalid=15325, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 21:46:01,864 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:01,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 21:46:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2022-01-31 21:46:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 88 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-01-31 21:46:01,870 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2022-01-31 21:46:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:01,871 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-01-31 21:46:01,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-01-31 21:46:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 21:46:01,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:01,871 INFO L514 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:01,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 21:46:01,871 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1863272694, now seen corresponding path program 76 times [2022-01-31 21:46:01,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:01,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817168955] [2022-01-31 21:46:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:01,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:01,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:01,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:01,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:03,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:03,992 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 21:46:03,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:03,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817168955] [2022-01-31 21:46:03,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [817168955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:03,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:03,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:46:03,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649083723] [2022-01-31 21:46:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:03,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:46:03,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:03,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:46:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:46:03,994 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:06,231 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-01-31 21:46:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 21:46:06,231 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:46:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:06,232 INFO L225 Difference]: With dead ends: 95 [2022-01-31 21:46:06,232 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 21:46:06,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 21:46:06,234 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:06,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 54 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 21:46:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-01-31 21:46:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 87 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-01-31 21:46:06,241 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 87 [2022-01-31 21:46:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:06,241 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-01-31 21:46:06,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 79 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-01-31 21:46:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 21:46:06,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:06,241 INFO L514 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:06,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 21:46:06,241 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1863321513, now seen corresponding path program 77 times [2022-01-31 21:46:06,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886033059] [2022-01-31 21:46:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:06,242 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:06,242 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:06,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:06,243 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:08,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:08,382 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 21:46:08,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886033059] [2022-01-31 21:46:08,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1886033059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:08,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:08,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 21:46:08,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343736005] [2022-01-31 21:46:08,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:08,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 21:46:08,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 21:46:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=3395, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:46:08,384 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:11,911 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-01-31 21:46:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:46:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:46:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:11,912 INFO L225 Difference]: With dead ends: 98 [2022-01-31 21:46:11,912 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 21:46:11,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9403, Invalid=15719, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 21:46:11,913 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:11,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 21:46:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2022-01-31 21:46:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 89 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-01-31 21:46:11,921 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 87 [2022-01-31 21:46:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:11,921 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-01-31 21:46:11,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-01-31 21:46:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 21:46:11,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:11,921 INFO L514 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:11,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 21:46:11,921 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1928395126, now seen corresponding path program 77 times [2022-01-31 21:46:11,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:11,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055366898] [2022-01-31 21:46:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:11,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:11,923 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:11,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:11,923 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:14,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:14,104 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 21:46:14,104 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:14,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055366898] [2022-01-31 21:46:14,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055366898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:14,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:14,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 21:46:14,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398785561] [2022-01-31 21:46:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:14,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 21:46:14,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:14,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 21:46:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:46:14,106 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:16,395 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-01-31 21:46:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:46:16,396 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-01-31 21:46:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:16,396 INFO L225 Difference]: With dead ends: 96 [2022-01-31 21:46:16,396 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 21:46:16,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 21:46:16,397 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:16,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 21:46:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-01-31 21:46:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 88 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-01-31 21:46:16,404 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2022-01-31 21:46:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:16,404 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-01-31 21:46:16,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 80 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-01-31 21:46:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 21:46:16,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:16,405 INFO L514 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:16,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 21:46:16,406 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:16,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:16,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1928443945, now seen corresponding path program 78 times [2022-01-31 21:46:16,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:16,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938446261] [2022-01-31 21:46:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:16,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:16,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:16,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:16,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:18,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:18,587 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 21:46:18,587 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:18,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938446261] [2022-01-31 21:46:18,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [938446261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:18,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:18,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 21:46:18,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92807746] [2022-01-31 21:46:18,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:18,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 21:46:18,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 21:46:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=3478, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:46:18,588 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:22,194 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2022-01-31 21:46:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 21:46:22,194 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-01-31 21:46:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:22,195 INFO L225 Difference]: With dead ends: 99 [2022-01-31 21:46:22,195 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 21:46:22,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9642, Invalid=16118, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 21:46:22,196 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:22,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 21:46:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-01-31 21:46:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-01-31 21:46:22,203 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2022-01-31 21:46:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:22,203 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-01-31 21:46:22,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-01-31 21:46:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:46:22,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:22,204 INFO L514 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:22,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 21:46:22,204 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash -347776778, now seen corresponding path program 78 times [2022-01-31 21:46:22,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:22,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955236560] [2022-01-31 21:46:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:22,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:22,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:22,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:22,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:24,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:24,434 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 21:46:24,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:24,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955236560] [2022-01-31 21:46:24,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955236560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:24,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:24,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 21:46:24,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523014837] [2022-01-31 21:46:24,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:24,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 21:46:24,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:24,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 21:46:24,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:46:24,436 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:26,767 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2022-01-31 21:46:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 21:46:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 21:46:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:26,767 INFO L225 Difference]: With dead ends: 97 [2022-01-31 21:46:26,767 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 21:46:26,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 21:46:26,769 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:26,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 21:46:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-01-31 21:46:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 89 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-01-31 21:46:26,776 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 89 [2022-01-31 21:46:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:26,776 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-01-31 21:46:26,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-01-31 21:46:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:46:26,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:26,777 INFO L514 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:26,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 21:46:26,777 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:26,777 INFO L85 PathProgramCache]: Analyzing trace with hash -347727959, now seen corresponding path program 79 times [2022-01-31 21:46:26,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:26,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819083945] [2022-01-31 21:46:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:26,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:26,778 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:26,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:26,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:29,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:29,006 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 21:46:29,006 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:29,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819083945] [2022-01-31 21:46:29,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819083945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:29,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:29,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:46:29,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141402810] [2022-01-31 21:46:29,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:29,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:46:29,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:29,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:46:29,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:46:29,008 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:32,689 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-01-31 21:46:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 21:46:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 21:46:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:32,689 INFO L225 Difference]: With dead ends: 100 [2022-01-31 21:46:32,690 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:46:32,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9884, Invalid=16522, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 21:46:32,691 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:32,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:46:32,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-01-31 21:46:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-01-31 21:46:32,698 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2022-01-31 21:46:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-01-31 21:46:32,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-01-31 21:46:32,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 21:46:32,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:32,699 INFO L514 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:32,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-01-31 21:46:32,699 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2105338230, now seen corresponding path program 79 times [2022-01-31 21:46:32,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:32,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232342013] [2022-01-31 21:46:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:32,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:32,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:32,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:32,700 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:34,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:34,985 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 21:46:34,985 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:34,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232342013] [2022-01-31 21:46:34,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232342013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:34,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:34,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:46:34,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621855885] [2022-01-31 21:46:34,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:34,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:46:34,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:46:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:46:34,986 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:37,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:37,374 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-01-31 21:46:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 21:46:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 21:46:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:37,375 INFO L225 Difference]: With dead ends: 98 [2022-01-31 21:46:37,375 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 21:46:37,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 21:46:37,376 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:37,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 21:46:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-01-31 21:46:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 90 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-01-31 21:46:37,383 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 90 [2022-01-31 21:46:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:37,383 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-01-31 21:46:37,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-01-31 21:46:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 21:46:37,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:37,384 INFO L514 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:37,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-01-31 21:46:37,384 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2105387049, now seen corresponding path program 80 times [2022-01-31 21:46:37,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:37,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650827296] [2022-01-31 21:46:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:37,385 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:37,385 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:37,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:37,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:39,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:46:39,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:39,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650827296] [2022-01-31 21:46:39,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [650827296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:39,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:39,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 21:46:39,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462958035] [2022-01-31 21:46:39,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:39,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 21:46:39,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 21:46:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=3647, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:46:39,656 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:43,432 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2022-01-31 21:46:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 21:46:43,432 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 21:46:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:43,433 INFO L225 Difference]: With dead ends: 101 [2022-01-31 21:46:43,433 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 21:46:43,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3398 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=10129, Invalid=16931, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 21:46:43,434 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:43,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 21:46:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-01-31 21:46:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.032967032967033) internal successors, (94), 92 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-01-31 21:46:43,441 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2022-01-31 21:46:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:43,441 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-01-31 21:46:43,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-01-31 21:46:43,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 21:46:43,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:43,442 INFO L514 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:43,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-01-31 21:46:43,442 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:43,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:43,442 INFO L85 PathProgramCache]: Analyzing trace with hash 842492150, now seen corresponding path program 80 times [2022-01-31 21:46:43,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:43,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643930295] [2022-01-31 21:46:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:43,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:43,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:43,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:43,443 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:45,806 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 21:46:45,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:45,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643930295] [2022-01-31 21:46:45,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [643930295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:45,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:45,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 21:46:45,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598129743] [2022-01-31 21:46:45,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:45,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 21:46:45,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:45,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 21:46:45,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:46:45,808 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:48,257 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2022-01-31 21:46:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 21:46:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 21:46:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:48,257 INFO L225 Difference]: With dead ends: 99 [2022-01-31 21:46:48,257 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 21:46:48,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 21:46:48,259 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:48,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 21:46:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-01-31 21:46:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 91 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-01-31 21:46:48,266 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2022-01-31 21:46:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:48,266 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-01-31 21:46:48,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-01-31 21:46:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 21:46:48,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:48,266 INFO L514 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:48,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-01-31 21:46:48,266 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash 842540969, now seen corresponding path program 81 times [2022-01-31 21:46:48,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:48,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857144274] [2022-01-31 21:46:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:48,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:48,268 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:48,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:48,268 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:50,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:50,597 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 21:46:50,597 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857144274] [2022-01-31 21:46:50,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857144274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:50,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:50,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 21:46:50,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071132735] [2022-01-31 21:46:50,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:50,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 21:46:50,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:50,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 21:46:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:46:50,599 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:54,467 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-01-31 21:46:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 21:46:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 21:46:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:54,468 INFO L225 Difference]: With dead ends: 102 [2022-01-31 21:46:54,468 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 21:46:54,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=10377, Invalid=17345, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 21:46:54,469 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:54,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 21:46:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-01-31 21:46:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-01-31 21:46:54,476 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 91 [2022-01-31 21:46:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:54,476 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-01-31 21:46:54,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-01-31 21:46:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:46:54,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:54,477 INFO L514 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:54,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-01-31 21:46:54,477 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash 348969334, now seen corresponding path program 81 times [2022-01-31 21:46:54,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:54,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866877533] [2022-01-31 21:46:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:54,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:54,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:54,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:54,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:56,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:46:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:46:56,861 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 21:46:56,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:46:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866877533] [2022-01-31 21:46:56,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1866877533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:46:56,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:46:56,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 21:46:56,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283815754] [2022-01-31 21:46:56,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:46:56,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 21:46:56,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:46:56,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 21:46:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:46:56,863 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:46:59,357 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-01-31 21:46:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 21:46:59,357 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 21:46:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:46:59,358 INFO L225 Difference]: With dead ends: 100 [2022-01-31 21:46:59,358 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 21:46:59,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 21:46:59,359 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:46:59,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:46:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 21:46:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-01-31 21:46:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.021978021978022) internal successors, (93), 92 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-01-31 21:46:59,366 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 92 [2022-01-31 21:46:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:46:59,366 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-01-31 21:46:59,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 84 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:46:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-01-31 21:46:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 21:46:59,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:46:59,367 INFO L514 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:46:59,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-01-31 21:46:59,367 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:46:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:46:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash 349018153, now seen corresponding path program 82 times [2022-01-31 21:46:59,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:46:59,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601046037] [2022-01-31 21:46:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:46:59,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:46:59,368 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:46:59,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:46:59,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:46:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:01,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:01,744 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 21:47:01,744 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601046037] [2022-01-31 21:47:01,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601046037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:01,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:01,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 21:47:01,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134204980] [2022-01-31 21:47:01,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:01,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 21:47:01,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:01,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 21:47:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=3820, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:47:01,746 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:05,670 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2022-01-31 21:47:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 21:47:05,670 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 21:47:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:05,670 INFO L225 Difference]: With dead ends: 103 [2022-01-31 21:47:05,670 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 21:47:05,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10628, Invalid=17764, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 21:47:05,672 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:05,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 21:47:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2022-01-31 21:47:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.032258064516129) internal successors, (96), 94 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-01-31 21:47:05,679 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 92 [2022-01-31 21:47:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:05,679 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-01-31 21:47:05,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-01-31 21:47:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 21:47:05,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:05,680 INFO L514 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:05,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-01-31 21:47:05,680 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2065336074, now seen corresponding path program 82 times [2022-01-31 21:47:05,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:05,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816732111] [2022-01-31 21:47:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:05,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:05,681 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:05,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:05,681 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:08,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:08,150 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 21:47:08,150 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:08,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816732111] [2022-01-31 21:47:08,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816732111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:08,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:08,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 21:47:08,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159884907] [2022-01-31 21:47:08,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:08,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 21:47:08,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 21:47:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:47:08,152 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:10,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:10,696 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2022-01-31 21:47:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 21:47:10,696 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 21:47:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:10,696 INFO L225 Difference]: With dead ends: 101 [2022-01-31 21:47:10,696 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 21:47:10,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 21:47:10,698 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:10,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 21:47:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-01-31 21:47:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 93 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-01-31 21:47:10,705 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 93 [2022-01-31 21:47:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:10,706 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-01-31 21:47:10,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 85 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-01-31 21:47:10,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 21:47:10,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:10,706 INFO L514 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:10,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-01-31 21:47:10,706 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:10,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:10,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2065287255, now seen corresponding path program 83 times [2022-01-31 21:47:10,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37198263] [2022-01-31 21:47:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:10,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:10,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:10,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:10,708 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:13,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:13,139 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 21:47:13,139 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:13,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37198263] [2022-01-31 21:47:13,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [37198263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:13,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 21:47:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096746922] [2022-01-31 21:47:13,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:13,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 21:47:13,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 21:47:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:47:13,141 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:17,166 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-01-31 21:47:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 21:47:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 21:47:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:17,167 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:47:17,167 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 21:47:17,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3650 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10882, Invalid=18188, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 21:47:17,169 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:17,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 21:47:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-01-31 21:47:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 95 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-01-31 21:47:17,176 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 93 [2022-01-31 21:47:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:17,176 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-01-31 21:47:17,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-01-31 21:47:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 21:47:17,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:17,177 INFO L514 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:17,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-01-31 21:47:17,177 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:17,177 INFO L85 PathProgramCache]: Analyzing trace with hash 400607606, now seen corresponding path program 83 times [2022-01-31 21:47:17,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:17,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002088080] [2022-01-31 21:47:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:17,178 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:17,178 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:17,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:17,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:19,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:19,650 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 21:47:19,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:19,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002088080] [2022-01-31 21:47:19,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002088080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:19,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:19,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 21:47:19,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680067557] [2022-01-31 21:47:19,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:19,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 21:47:19,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:19,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 21:47:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:47:19,652 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:22,251 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-01-31 21:47:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 21:47:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 21:47:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:22,252 INFO L225 Difference]: With dead ends: 102 [2022-01-31 21:47:22,252 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 21:47:22,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 21:47:22,253 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:22,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 21:47:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-01-31 21:47:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-01-31 21:47:22,260 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2022-01-31 21:47:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:22,261 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-01-31 21:47:22,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 86 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-01-31 21:47:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 21:47:22,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:22,261 INFO L514 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:22,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-01-31 21:47:22,261 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:22,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash 400656425, now seen corresponding path program 84 times [2022-01-31 21:47:22,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:22,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371880875] [2022-01-31 21:47:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:22,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:22,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:22,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:22,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:24,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:24,762 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 21:47:24,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:24,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371880875] [2022-01-31 21:47:24,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [371880875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:24,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:24,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 21:47:24,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489482390] [2022-01-31 21:47:24,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:24,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 21:47:24,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:24,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 21:47:24,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=3997, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 21:47:24,764 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:28,853 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-01-31 21:47:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 21:47:28,854 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 21:47:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:28,854 INFO L225 Difference]: With dead ends: 105 [2022-01-31 21:47:28,854 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 21:47:28,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=11139, Invalid=18617, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 21:47:28,855 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:28,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 21:47:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-01-31 21:47:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 96 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-01-31 21:47:28,863 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 94 [2022-01-31 21:47:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:28,863 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-01-31 21:47:28,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-01-31 21:47:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:47:28,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:28,863 INFO L514 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:28,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-01-31 21:47:28,864 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -464549642, now seen corresponding path program 84 times [2022-01-31 21:47:28,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:28,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552242878] [2022-01-31 21:47:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:28,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:28,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:28,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:28,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:31,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:31,405 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 21:47:31,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:31,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552242878] [2022-01-31 21:47:31,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552242878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:31,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:31,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 21:47:31,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817211897] [2022-01-31 21:47:31,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:31,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 21:47:31,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 21:47:31,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 21:47:31,411 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:34,077 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2022-01-31 21:47:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 21:47:34,077 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 21:47:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:34,077 INFO L225 Difference]: With dead ends: 103 [2022-01-31 21:47:34,078 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 21:47:34,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 21:47:34,079 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:34,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 21:47:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-01-31 21:47:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 95 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-01-31 21:47:34,087 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 95 [2022-01-31 21:47:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:34,087 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-01-31 21:47:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 87 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-01-31 21:47:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 21:47:34,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:34,088 INFO L514 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:34,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-01-31 21:47:34,088 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:34,088 INFO L85 PathProgramCache]: Analyzing trace with hash -464500823, now seen corresponding path program 85 times [2022-01-31 21:47:34,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:34,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131618787] [2022-01-31 21:47:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:34,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:34,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:34,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:34,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:36,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:36,620 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 21:47:36,620 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:36,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131618787] [2022-01-31 21:47:36,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131618787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:36,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:36,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 21:47:36,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112560417] [2022-01-31 21:47:36,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:36,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 21:47:36,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:36,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 21:47:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 21:47:36,622 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:40,804 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-01-31 21:47:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 21:47:40,804 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 21:47:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:40,804 INFO L225 Difference]: With dead ends: 106 [2022-01-31 21:47:40,804 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:47:40,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3823 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=11399, Invalid=19051, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 21:47:40,806 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:40,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:47:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2022-01-31 21:47:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 97 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-01-31 21:47:40,818 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 95 [2022-01-31 21:47:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:40,818 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-01-31 21:47:40,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-01-31 21:47:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 21:47:40,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:40,819 INFO L514 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:40,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-01-31 21:47:40,819 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:40,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1514620554, now seen corresponding path program 85 times [2022-01-31 21:47:40,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:40,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442684975] [2022-01-31 21:47:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:40,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:40,820 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:40,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:40,821 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:43,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:43,448 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 21:47:43,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442684975] [2022-01-31 21:47:43,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [442684975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:43,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:43,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 21:47:43,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299558224] [2022-01-31 21:47:43,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:43,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 21:47:43,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 21:47:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 21:47:43,451 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:46,164 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-01-31 21:47:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 21:47:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 21:47:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:46,165 INFO L225 Difference]: With dead ends: 104 [2022-01-31 21:47:46,165 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 21:47:46,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 21:47:46,166 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:46,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 21:47:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-01-31 21:47:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 96 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-01-31 21:47:46,174 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 96 [2022-01-31 21:47:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:46,174 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-01-31 21:47:46,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 88 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-01-31 21:47:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 21:47:46,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:46,174 INFO L514 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:46,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-01-31 21:47:46,175 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:46,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1514571735, now seen corresponding path program 86 times [2022-01-31 21:47:46,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:46,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943659955] [2022-01-31 21:47:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:46,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:46,176 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:46,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:46,176 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:48,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:48,769 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 21:47:48,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:48,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943659955] [2022-01-31 21:47:48,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [943659955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:48,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:48,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 21:47:48,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598638576] [2022-01-31 21:47:48,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:48,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 21:47:48,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 21:47:48,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=4178, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 21:47:48,771 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:53,047 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2022-01-31 21:47:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 21:47:53,047 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 21:47:53,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:53,047 INFO L225 Difference]: With dead ends: 107 [2022-01-31 21:47:53,048 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 21:47:53,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=11662, Invalid=19490, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 21:47:53,049 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:53,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 21:47:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2022-01-31 21:47:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-01-31 21:47:53,057 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2022-01-31 21:47:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:53,057 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-01-31 21:47:53,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-01-31 21:47:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 21:47:53,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:53,057 INFO L514 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:53,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-01-31 21:47:53,057 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 292919542, now seen corresponding path program 86 times [2022-01-31 21:47:53,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:53,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528503860] [2022-01-31 21:47:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:53,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:53,058 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:53,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:53,059 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:55,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:47:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:47:55,723 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 21:47:55,723 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:47:55,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528503860] [2022-01-31 21:47:55,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [528503860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:47:55,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:47:55,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 21:47:55,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56833845] [2022-01-31 21:47:55,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:47:55,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 21:47:55,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:47:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 21:47:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 21:47:55,725 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:47:58,524 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-01-31 21:47:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 21:47:58,525 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 21:47:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:47:58,525 INFO L225 Difference]: With dead ends: 105 [2022-01-31 21:47:58,525 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 21:47:58,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 21:47:58,527 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:47:58,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:47:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 21:47:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-31 21:47:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 97 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-01-31 21:47:58,534 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2022-01-31 21:47:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:47:58,534 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-01-31 21:47:58,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 89 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:47:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-01-31 21:47:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 21:47:58,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:47:58,535 INFO L514 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:47:58,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-01-31 21:47:58,535 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:47:58,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:47:58,535 INFO L85 PathProgramCache]: Analyzing trace with hash 292968361, now seen corresponding path program 87 times [2022-01-31 21:47:58,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:47:58,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311915349] [2022-01-31 21:47:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:47:58,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:47:58,536 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:47:58,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:47:58,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:47:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:01,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:01,188 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 21:48:01,188 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311915349] [2022-01-31 21:48:01,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311915349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:01,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:01,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 21:48:01,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024009949] [2022-01-31 21:48:01,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:01,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 21:48:01,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 21:48:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:48:01,190 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 91 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:05,543 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-01-31 21:48:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 21:48:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 21:48:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:05,543 INFO L225 Difference]: With dead ends: 108 [2022-01-31 21:48:05,543 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 21:48:05,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11928, Invalid=19934, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 21:48:05,545 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:05,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 21:48:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2022-01-31 21:48:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 99 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-01-31 21:48:05,553 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 97 [2022-01-31 21:48:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:05,553 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-01-31 21:48:05,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-01-31 21:48:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 21:48:05,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:05,553 INFO L514 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:05,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-01-31 21:48:05,554 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 492087670, now seen corresponding path program 87 times [2022-01-31 21:48:05,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:05,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034476796] [2022-01-31 21:48:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:05,555 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:05,555 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:05,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:05,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:08,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:08,256 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 21:48:08,256 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034476796] [2022-01-31 21:48:08,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034476796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:08,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:08,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 21:48:08,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671780020] [2022-01-31 21:48:08,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:08,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 21:48:08,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 21:48:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:48:08,262 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:11,098 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-01-31 21:48:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 21:48:11,099 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 21:48:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:11,099 INFO L225 Difference]: With dead ends: 106 [2022-01-31 21:48:11,099 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 21:48:11,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 21:48:11,101 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:11,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 21:48:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-01-31 21:48:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 98 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:11,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-01-31 21:48:11,108 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 98 [2022-01-31 21:48:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:11,108 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-01-31 21:48:11,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-01-31 21:48:11,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 21:48:11,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:11,109 INFO L514 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:11,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-01-31 21:48:11,109 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:11,109 INFO L85 PathProgramCache]: Analyzing trace with hash 492136489, now seen corresponding path program 88 times [2022-01-31 21:48:11,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:11,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311562773] [2022-01-31 21:48:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:11,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:11,110 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:11,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:11,110 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:13,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:13,814 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 21:48:13,814 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311562773] [2022-01-31 21:48:13,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311562773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:13,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:13,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 21:48:13,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299011789] [2022-01-31 21:48:13,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:13,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 21:48:13,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:13,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 21:48:13,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=4363, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 21:48:13,817 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 92 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:18,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:18,261 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2022-01-31 21:48:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 21:48:18,261 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 21:48:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:18,262 INFO L225 Difference]: With dead ends: 109 [2022-01-31 21:48:18,262 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 21:48:18,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4090 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=12197, Invalid=20383, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 21:48:18,263 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:18,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 21:48:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2022-01-31 21:48:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 100 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-01-31 21:48:18,271 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 98 [2022-01-31 21:48:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:18,271 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-01-31 21:48:18,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-01-31 21:48:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 21:48:18,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:18,271 INFO L514 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:18,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2022-01-31 21:48:18,271 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1923634954, now seen corresponding path program 88 times [2022-01-31 21:48:18,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527422769] [2022-01-31 21:48:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:18,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:18,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:18,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:18,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:21,040 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 21:48:21,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:21,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527422769] [2022-01-31 21:48:21,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527422769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:21,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:21,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 21:48:21,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587286641] [2022-01-31 21:48:21,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:21,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 21:48:21,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 21:48:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 21:48:21,042 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:23,954 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2022-01-31 21:48:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 21:48:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:48:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:23,955 INFO L225 Difference]: With dead ends: 107 [2022-01-31 21:48:23,955 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 21:48:23,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 21:48:23,957 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:23,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 21:48:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-01-31 21:48:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 99 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-01-31 21:48:23,964 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 99 [2022-01-31 21:48:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:23,964 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-01-31 21:48:23,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 91 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-01-31 21:48:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 21:48:23,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:23,965 INFO L514 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:23,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2022-01-31 21:48:23,965 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1923586135, now seen corresponding path program 89 times [2022-01-31 21:48:23,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:23,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506943423] [2022-01-31 21:48:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:23,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:23,966 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:23,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:23,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:26,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:26,754 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 21:48:26,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:26,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506943423] [2022-01-31 21:48:26,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [506943423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:26,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:26,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 21:48:26,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013338192] [2022-01-31 21:48:26,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:26,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 21:48:26,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:26,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 21:48:26,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=4457, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:48:26,756 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 93 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:31,281 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-01-31 21:48:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 21:48:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:48:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:31,281 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:48:31,281 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 21:48:31,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4181 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=12469, Invalid=20837, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 21:48:31,283 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:31,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 21:48:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2022-01-31 21:48:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 101 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-01-31 21:48:31,291 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 99 [2022-01-31 21:48:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:31,291 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-01-31 21:48:31,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-01-31 21:48:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 21:48:31,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:31,291 INFO L514 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:31,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-01-31 21:48:31,291 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash 498375030, now seen corresponding path program 89 times [2022-01-31 21:48:31,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:31,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995094507] [2022-01-31 21:48:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:31,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:31,292 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:31,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:31,293 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:34,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:34,110 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 21:48:34,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995094507] [2022-01-31 21:48:34,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [995094507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:34,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:34,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 21:48:34,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310574934] [2022-01-31 21:48:34,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:34,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 21:48:34,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:34,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 21:48:34,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:48:34,112 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:37,072 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-01-31 21:48:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 21:48:37,072 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 21:48:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:37,073 INFO L225 Difference]: With dead ends: 108 [2022-01-31 21:48:37,073 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:48:37,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 21:48:37,074 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:37,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 64 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:48:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 21:48:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-01-31 21:48:37,082 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2022-01-31 21:48:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:37,082 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-01-31 21:48:37,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 92 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-01-31 21:48:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 21:48:37,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:37,082 INFO L514 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:37,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-01-31 21:48:37,082 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash 498423849, now seen corresponding path program 90 times [2022-01-31 21:48:37,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:37,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945642338] [2022-01-31 21:48:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:37,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:37,083 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:37,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:37,084 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:39,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:39,898 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 21:48:39,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945642338] [2022-01-31 21:48:39,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945642338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:39,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:39,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 21:48:39,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612565115] [2022-01-31 21:48:39,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:39,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 21:48:39,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:39,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 21:48:39,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=4552, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 21:48:39,900 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:44,542 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2022-01-31 21:48:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 21:48:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 21:48:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:44,542 INFO L225 Difference]: With dead ends: 111 [2022-01-31 21:48:44,542 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 21:48:44,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=12744, Invalid=21296, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 21:48:44,544 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:44,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 68 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 21:48:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-01-31 21:48:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 102 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-01-31 21:48:44,557 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 100 [2022-01-31 21:48:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:44,557 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-01-31 21:48:44,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-01-31 21:48:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 21:48:44,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:44,558 INFO L514 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:44,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2022-01-31 21:48:44,558 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1728726794, now seen corresponding path program 90 times [2022-01-31 21:48:44,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:44,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389057081] [2022-01-31 21:48:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:44,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:44,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:44,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:44,560 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:47,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:47,448 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 21:48:47,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389057081] [2022-01-31 21:48:47,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389057081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:47,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:47,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 21:48:47,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905639280] [2022-01-31 21:48:47,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:47,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 21:48:47,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 21:48:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 21:48:47,450 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:50,490 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2022-01-31 21:48:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 21:48:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 21:48:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:50,491 INFO L225 Difference]: With dead ends: 109 [2022-01-31 21:48:50,491 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 21:48:50,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 3 SyntacticMatches, 1 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 21:48:50,493 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:50,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 21:48:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-01-31 21:48:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 101 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-01-31 21:48:50,501 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 101 [2022-01-31 21:48:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:50,501 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-01-31 21:48:50,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 93 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-01-31 21:48:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 21:48:50,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:50,502 INFO L514 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:50,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-01-31 21:48:50,502 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1728677975, now seen corresponding path program 91 times [2022-01-31 21:48:50,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:50,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032184910] [2022-01-31 21:48:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:50,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:50,503 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:50,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:50,503 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:48:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:48:53,385 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 21:48:53,385 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:48:53,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032184910] [2022-01-31 21:48:53,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1032184910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:48:53,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:48:53,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 21:48:53,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395933958] [2022-01-31 21:48:53,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:48:53,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 21:48:53,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:48:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 21:48:53,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 21:48:53,387 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 95 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:48:58,126 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-01-31 21:48:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 21:48:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 21:48:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:48:58,126 INFO L225 Difference]: With dead ends: 112 [2022-01-31 21:48:58,126 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:48:58,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4366 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=13022, Invalid=21760, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 21:48:58,128 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:48:58,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:48:58,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:48:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-01-31 21:48:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 103 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-01-31 21:48:58,136 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2022-01-31 21:48:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:48:58,136 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-01-31 21:48:58,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:48:58,136 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-01-31 21:48:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 21:48:58,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:48:58,136 INFO L514 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:48:58,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-01-31 21:48:58,137 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:48:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:48:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2049406602, now seen corresponding path program 91 times [2022-01-31 21:48:58,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:48:58,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754710882] [2022-01-31 21:48:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:48:58,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:48:58,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:48:58,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:48:58,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:48:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:01,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:01,098 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 21:49:01,099 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:01,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754710882] [2022-01-31 21:49:01,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [754710882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:01,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:01,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 21:49:01,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665249394] [2022-01-31 21:49:01,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:01,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 21:49:01,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 21:49:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 21:49:01,100 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 94 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:49:04,218 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-01-31 21:49:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 21:49:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 94 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 21:49:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:49:04,218 INFO L225 Difference]: With dead ends: 110 [2022-01-31 21:49:04,218 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 21:49:04,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 21:49:04,220 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:49:04,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:49:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 21:49:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-01-31 21:49:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-01-31 21:49:04,228 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 102 [2022-01-31 21:49:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:49:04,229 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-01-31 21:49:04,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 94 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-01-31 21:49:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 21:49:04,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:49:04,229 INFO L514 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:49:04,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2022-01-31 21:49:04,229 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:49:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:49:04,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2049357783, now seen corresponding path program 92 times [2022-01-31 21:49:04,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:49:04,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107975755] [2022-01-31 21:49:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:49:04,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:49:04,230 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:49:04,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:49:04,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:49:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:07,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:07,180 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 21:49:07,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:07,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107975755] [2022-01-31 21:49:07,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2107975755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:07,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:07,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 21:49:07,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855475812] [2022-01-31 21:49:07,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:07,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 21:49:07,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 21:49:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=4745, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 21:49:07,182 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 96 states, 96 states have (on average 1.03125) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:49:12,015 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2022-01-31 21:49:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 21:49:12,015 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.03125) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 21:49:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:49:12,016 INFO L225 Difference]: With dead ends: 113 [2022-01-31 21:49:12,016 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 21:49:12,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4460 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=13303, Invalid=22229, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 21:49:12,017 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:49:12,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:49:12,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 21:49:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2022-01-31 21:49:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.029126213592233) internal successors, (106), 104 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-01-31 21:49:12,025 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 102 [2022-01-31 21:49:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:49:12,026 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-01-31 21:49:12,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.03125) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-01-31 21:49:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 21:49:12,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:49:12,026 INFO L514 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:49:12,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2022-01-31 21:49:12,026 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:49:12,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:49:12,026 INFO L85 PathProgramCache]: Analyzing trace with hash 894421238, now seen corresponding path program 92 times [2022-01-31 21:49:12,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:49:12,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201798556] [2022-01-31 21:49:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:49:12,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:49:12,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:49:12,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:49:12,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:49:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:15,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:15,036 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 21:49:15,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:15,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201798556] [2022-01-31 21:49:15,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [201798556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:15,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:15,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 21:49:15,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789135695] [2022-01-31 21:49:15,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:15,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 21:49:15,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 21:49:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 21:49:15,037 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 95 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:49:18,198 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2022-01-31 21:49:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 21:49:18,199 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 95 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 21:49:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:49:18,199 INFO L225 Difference]: With dead ends: 111 [2022-01-31 21:49:18,199 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 21:49:18,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 21:49:18,201 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:49:18,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:49:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 21:49:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-01-31 21:49:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 103 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-01-31 21:49:18,209 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2022-01-31 21:49:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:49:18,209 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-01-31 21:49:18,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 95 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-01-31 21:49:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 21:49:18,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:49:18,210 INFO L514 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:49:18,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-01-31 21:49:18,210 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:49:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:49:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash 894470057, now seen corresponding path program 93 times [2022-01-31 21:49:18,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:49:18,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078911983] [2022-01-31 21:49:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:49:18,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:49:18,211 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:49:18,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:49:18,211 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:49:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:21,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:21,234 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 21:49:21,235 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:21,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078911983] [2022-01-31 21:49:21,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078911983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:21,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:21,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 21:49:21,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827733666] [2022-01-31 21:49:21,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:21,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 21:49:21,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 21:49:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:49:21,237 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:49:26,157 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-01-31 21:49:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 21:49:26,157 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 21:49:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:49:26,157 INFO L225 Difference]: With dead ends: 114 [2022-01-31 21:49:26,157 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 21:49:26,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4555 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=13587, Invalid=22703, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 21:49:26,159 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:49:26,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:49:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 21:49:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-01-31 21:49:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 105 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-01-31 21:49:26,167 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 103 [2022-01-31 21:49:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:49:26,167 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-01-31 21:49:26,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-01-31 21:49:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 21:49:26,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:49:26,168 INFO L514 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:49:26,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-01-31 21:49:26,168 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:49:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:49:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1958771062, now seen corresponding path program 93 times [2022-01-31 21:49:26,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:49:26,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022705987] [2022-01-31 21:49:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:49:26,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:49:26,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:49:26,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:49:26,169 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:49:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:29,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:49:29,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022705987] [2022-01-31 21:49:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022705987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:29,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:29,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 21:49:29,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588251336] [2022-01-31 21:49:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 21:49:29,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 21:49:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:49:29,235 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:49:32,459 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-01-31 21:49:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 21:49:32,460 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 21:49:32,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:49:32,460 INFO L225 Difference]: With dead ends: 112 [2022-01-31 21:49:32,460 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 21:49:32,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 21:49:32,461 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:49:32,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:49:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 21:49:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-01-31 21:49:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 104 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-01-31 21:49:32,470 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 104 [2022-01-31 21:49:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:49:32,470 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-01-31 21:49:32,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-01-31 21:49:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 21:49:32,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:49:32,470 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:49:32,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2022-01-31 21:49:32,471 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:49:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:49:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1958819881, now seen corresponding path program 94 times [2022-01-31 21:49:32,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:49:32,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857501351] [2022-01-31 21:49:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:49:32,472 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:49:32,472 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:49:32,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:49:32,472 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:49:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:35,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:35,536 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 21:49:35,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857501351] [2022-01-31 21:49:35,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857501351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:35,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:35,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 21:49:35,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674045966] [2022-01-31 21:49:35,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:35,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 21:49:35,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:35,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 21:49:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=4942, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 21:49:35,538 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:49:40,558 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-01-31 21:49:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 21:49:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 21:49:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:49:40,558 INFO L225 Difference]: With dead ends: 115 [2022-01-31 21:49:40,558 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 21:49:40,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=13874, Invalid=23182, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 21:49:40,560 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:49:40,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:49:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 21:49:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2022-01-31 21:49:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 106 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-01-31 21:49:40,568 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 104 [2022-01-31 21:49:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:49:40,568 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-01-31 21:49:40,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-01-31 21:49:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 21:49:40,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:49:40,568 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:49:40,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-01-31 21:49:40,569 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:49:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:49:40,569 INFO L85 PathProgramCache]: Analyzing trace with hash 593877238, now seen corresponding path program 94 times [2022-01-31 21:49:40,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:49:40,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146684569] [2022-01-31 21:49:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:49:40,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:49:40,570 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:49:40,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:49:40,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:49:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:43,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:43,701 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 21:49:43,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:43,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146684569] [2022-01-31 21:49:43,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1146684569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:43,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:43,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 21:49:43,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261461318] [2022-01-31 21:49:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:43,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 21:49:43,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 21:49:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 21:49:43,703 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 97 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:49:46,998 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2022-01-31 21:49:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 21:49:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 97 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 21:49:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:49:46,998 INFO L225 Difference]: With dead ends: 113 [2022-01-31 21:49:46,998 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 21:49:47,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 21:49:47,000 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:49:47,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:49:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 21:49:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-01-31 21:49:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 105 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-01-31 21:49:47,008 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 105 [2022-01-31 21:49:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:49:47,008 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-01-31 21:49:47,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 97 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-01-31 21:49:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 21:49:47,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:49:47,009 INFO L514 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:49:47,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-01-31 21:49:47,009 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:49:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:49:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash 593926057, now seen corresponding path program 95 times [2022-01-31 21:49:47,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:49:47,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994382585] [2022-01-31 21:49:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:49:47,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:49:47,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:49:47,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:49:47,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:49:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:50,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:50,154 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 21:49:50,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:50,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994382585] [2022-01-31 21:49:50,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994382585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:50,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:50,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 21:49:50,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262457267] [2022-01-31 21:49:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:50,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 21:49:50,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 21:49:50,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4660, Invalid=5042, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:49:50,156 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 99 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 98 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:49:55,288 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-01-31 21:49:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 21:49:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 98 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 21:49:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:49:55,289 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:49:55,289 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 21:49:55,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4748 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=14164, Invalid=23666, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 21:49:55,291 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:49:55,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:49:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 21:49:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2022-01-31 21:49:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.028301886792453) internal successors, (109), 107 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-01-31 21:49:55,299 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 105 [2022-01-31 21:49:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:49:55,299 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-01-31 21:49:55,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 98 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:49:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-01-31 21:49:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 21:49:55,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:49:55,300 INFO L514 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:49:55,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-01-31 21:49:55,300 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:49:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:49:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1231841654, now seen corresponding path program 95 times [2022-01-31 21:49:55,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:49:55,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047594664] [2022-01-31 21:49:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:49:55,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:49:55,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:49:55,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:49:55,302 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:49:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:58,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:49:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:49:58,502 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 21:49:58,502 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:49:58,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047594664] [2022-01-31 21:49:58,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047594664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:49:58,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:49:58,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 21:49:58,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579487866] [2022-01-31 21:49:58,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:49:58,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 21:49:58,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:49:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 21:49:58,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:49:58,504 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 98 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:50:01,859 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-01-31 21:50:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 21:50:01,860 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 98 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 21:50:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:50:01,860 INFO L225 Difference]: With dead ends: 114 [2022-01-31 21:50:01,860 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 21:50:01,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 21:50:01,862 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:50:01,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:50:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 21:50:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-01-31 21:50:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 106 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-01-31 21:50:01,870 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2022-01-31 21:50:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:50:01,870 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-01-31 21:50:01,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 98 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-01-31 21:50:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 21:50:01,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:50:01,870 INFO L514 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:50:01,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-01-31 21:50:01,871 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:50:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:50:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1231890473, now seen corresponding path program 96 times [2022-01-31 21:50:01,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:50:01,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791910009] [2022-01-31 21:50:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:50:01,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:50:01,873 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:50:01,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:50:01,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:50:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:05,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:50:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:05,136 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 21:50:05,136 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:50:05,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791910009] [2022-01-31 21:50:05,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [791910009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:50:05,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:50:05,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 21:50:05,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658037387] [2022-01-31 21:50:05,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:50:05,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 21:50:05,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:50:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 21:50:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=5143, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:50:05,141 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 100 states, 100 states have (on average 1.03) internal successors, (103), 99 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:50:10,363 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2022-01-31 21:50:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 21:50:10,363 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.03) internal successors, (103), 99 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 21:50:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:50:10,364 INFO L225 Difference]: With dead ends: 117 [2022-01-31 21:50:10,364 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 21:50:10,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4846 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=14457, Invalid=24155, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 21:50:10,366 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:50:10,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:50:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 21:50:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2022-01-31 21:50:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 108 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-01-31 21:50:10,374 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2022-01-31 21:50:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:50:10,374 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-01-31 21:50:10,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.03) internal successors, (103), 99 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-01-31 21:50:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 21:50:10,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:50:10,375 INFO L514 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:50:10,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-01-31 21:50:10,375 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:50:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:50:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash -466097930, now seen corresponding path program 96 times [2022-01-31 21:50:10,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:50:10,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040914822] [2022-01-31 21:50:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:50:10,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:50:10,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:50:10,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:50:10,376 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:50:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:13,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:50:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:13,636 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 21:50:13,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:50:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040914822] [2022-01-31 21:50:13,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040914822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:50:13,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:50:13,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 21:50:13,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91964527] [2022-01-31 21:50:13,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:50:13,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 21:50:13,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:50:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 21:50:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:50:13,638 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 100 states, 100 states have (on average 1.04) internal successors, (104), 99 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:50:17,057 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-01-31 21:50:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 21:50:17,058 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 99 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 21:50:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:50:17,058 INFO L225 Difference]: With dead ends: 115 [2022-01-31 21:50:17,058 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 21:50:17,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 21:50:17,060 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:50:17,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:50:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 21:50:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-01-31 21:50:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 107 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-01-31 21:50:17,068 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 107 [2022-01-31 21:50:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:50:17,068 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-01-31 21:50:17,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 99 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-01-31 21:50:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 21:50:17,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:50:17,069 INFO L514 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:50:17,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-01-31 21:50:17,069 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:50:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:50:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash -466049111, now seen corresponding path program 97 times [2022-01-31 21:50:17,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:50:17,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928206780] [2022-01-31 21:50:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:50:17,070 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:50:17,070 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:50:17,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:50:17,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:50:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:20,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:50:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:20,320 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 21:50:20,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:50:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928206780] [2022-01-31 21:50:20,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [928206780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:50:20,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:50:20,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 21:50:20,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670342320] [2022-01-31 21:50:20,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:50:20,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 21:50:20,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:50:20,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 21:50:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 21:50:20,323 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 101 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 100 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:50:25,632 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-01-31 21:50:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 21:50:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 100 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 21:50:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:50:25,633 INFO L225 Difference]: With dead ends: 118 [2022-01-31 21:50:25,633 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:50:25,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4945 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=14753, Invalid=24649, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 21:50:25,634 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:50:25,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:50:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:50:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2022-01-31 21:50:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 109 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-01-31 21:50:25,643 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 107 [2022-01-31 21:50:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:50:25,643 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-01-31 21:50:25,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 100 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-01-31 21:50:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 21:50:25,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:50:25,643 INFO L514 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:50:25,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2022-01-31 21:50:25,643 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:50:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:50:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1562617482, now seen corresponding path program 97 times [2022-01-31 21:50:25,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:50:25,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839846709] [2022-01-31 21:50:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:50:25,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:50:25,645 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:50:25,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:50:25,645 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:50:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:28,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:50:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:28,973 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 21:50:28,973 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:50:28,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839846709] [2022-01-31 21:50:28,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [839846709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:50:28,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:50:28,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 21:50:28,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001669714] [2022-01-31 21:50:28,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:50:28,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 21:50:28,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:50:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 21:50:28,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 21:50:28,975 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 100 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:50:32,520 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-01-31 21:50:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 21:50:32,521 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 100 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-01-31 21:50:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:50:32,521 INFO L225 Difference]: With dead ends: 116 [2022-01-31 21:50:32,521 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 21:50:32,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 21:50:32,523 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:50:32,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 64 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:50:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 21:50:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-31 21:50:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 108 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-01-31 21:50:32,531 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 108 [2022-01-31 21:50:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:50:32,531 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-01-31 21:50:32,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 100 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-01-31 21:50:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 21:50:32,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:50:32,531 INFO L514 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:50:32,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2022-01-31 21:50:32,532 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:50:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:50:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1562568663, now seen corresponding path program 98 times [2022-01-31 21:50:32,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:50:32,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883033526] [2022-01-31 21:50:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:50:32,532 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:50:32,533 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:50:32,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:50:32,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:50:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:35,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:50:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:35,853 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 21:50:35,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:50:35,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883033526] [2022-01-31 21:50:35,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [883033526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:50:35,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:50:35,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 21:50:35,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005478572] [2022-01-31 21:50:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:50:35,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 21:50:35,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:50:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 21:50:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=5348, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:50:35,855 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 102 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 101 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:50:41,257 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2022-01-31 21:50:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 21:50:41,258 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 101 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-01-31 21:50:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:50:41,258 INFO L225 Difference]: With dead ends: 119 [2022-01-31 21:50:41,258 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 21:50:41,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5045 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=15052, Invalid=25148, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 21:50:41,260 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:50:41,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:50:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 21:50:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-01-31 21:50:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 110 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-01-31 21:50:41,268 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 108 [2022-01-31 21:50:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:50:41,269 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-01-31 21:50:41,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 101 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-01-31 21:50:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 21:50:41,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:50:41,269 INFO L514 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:50:41,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-01-31 21:50:41,269 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:50:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:50:41,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1194985226, now seen corresponding path program 98 times [2022-01-31 21:50:41,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:50:41,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709719746] [2022-01-31 21:50:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:50:41,270 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:50:41,270 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:50:41,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:50:41,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:50:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:44,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:50:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:44,642 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 21:50:44,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:50:44,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709719746] [2022-01-31 21:50:44,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709719746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:50:44,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:50:44,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 21:50:44,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096595587] [2022-01-31 21:50:44,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:50:44,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 21:50:44,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:50:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 21:50:44,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:50:44,644 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 101 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:50:48,180 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2022-01-31 21:50:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 21:50:48,180 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 101 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 21:50:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:50:48,181 INFO L225 Difference]: With dead ends: 117 [2022-01-31 21:50:48,181 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 21:50:48,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 21:50:48,183 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:50:48,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 44 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:50:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 21:50:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-01-31 21:50:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 109 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-01-31 21:50:48,191 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2022-01-31 21:50:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:50:48,191 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-01-31 21:50:48,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 101 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-01-31 21:50:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 21:50:48,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:50:48,191 INFO L514 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:50:48,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-01-31 21:50:48,192 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:50:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:50:48,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1194936407, now seen corresponding path program 99 times [2022-01-31 21:50:48,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:50:48,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096414182] [2022-01-31 21:50:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:50:48,193 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:50:48,193 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:50:48,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:50:48,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:50:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:51,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:50:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:50:51,559 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 21:50:51,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:50:51,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096414182] [2022-01-31 21:50:51,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2096414182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:50:51,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:50:51,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 21:50:51,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913555338] [2022-01-31 21:50:51,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:50:51,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 21:50:51,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:50:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 21:50:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:50:51,561 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 103 states, 103 states have (on average 1.029126213592233) internal successors, (106), 102 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:50:57,058 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-01-31 21:50:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 21:50:57,058 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.029126213592233) internal successors, (106), 102 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 21:50:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:50:57,058 INFO L225 Difference]: With dead ends: 120 [2022-01-31 21:50:57,058 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 21:50:57,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5146 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15354, Invalid=25652, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 21:50:57,061 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:50:57,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:50:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 21:50:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-01-31 21:50:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 111 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-01-31 21:50:57,069 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 109 [2022-01-31 21:50:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:50:57,069 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-01-31 21:50:57,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.029126213592233) internal successors, (106), 102 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:50:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-01-31 21:50:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 21:50:57,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:50:57,075 INFO L514 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:50:57,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-01-31 21:50:57,075 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:50:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:50:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1611680118, now seen corresponding path program 99 times [2022-01-31 21:50:57,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:50:57,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211992118] [2022-01-31 21:50:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:50:57,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:50:57,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:50:57,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:50:57,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:50:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:00,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:51:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:00,487 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 21:51:00,487 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:51:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211992118] [2022-01-31 21:51:00,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [211992118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:51:00,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:51:00,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 21:51:00,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181121519] [2022-01-31 21:51:00,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:51:00,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 21:51:00,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:51:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 21:51:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:51:00,490 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:51:04,067 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-01-31 21:51:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 21:51:04,067 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 21:51:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:51:04,067 INFO L225 Difference]: With dead ends: 118 [2022-01-31 21:51:04,068 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 21:51:04,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 21:51:04,070 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:51:04,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:51:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 21:51:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-01-31 21:51:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 110 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-01-31 21:51:04,078 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 110 [2022-01-31 21:51:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:51:04,078 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-01-31 21:51:04,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-01-31 21:51:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 21:51:04,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:51:04,079 INFO L514 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:51:04,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-01-31 21:51:04,079 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:51:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:51:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1611728937, now seen corresponding path program 100 times [2022-01-31 21:51:04,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:51:04,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664825189] [2022-01-31 21:51:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:51:04,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:51:04,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:51:04,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:51:04,080 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:51:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:07,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:51:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:07,508 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 21:51:07,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:51:07,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664825189] [2022-01-31 21:51:07,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [664825189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:51:07,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:51:07,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 21:51:07,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104892357] [2022-01-31 21:51:07,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:51:07,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 21:51:07,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:51:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 21:51:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=5557, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 21:51:07,510 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 104 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 103 states have internal predecessors, (107), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:51:13,105 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2022-01-31 21:51:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 21:51:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 103 states have internal predecessors, (107), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 21:51:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:51:13,106 INFO L225 Difference]: With dead ends: 121 [2022-01-31 21:51:13,106 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 21:51:13,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5248 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=15659, Invalid=26161, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 21:51:13,108 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:51:13,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:51:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 21:51:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-01-31 21:51:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.027027027027027) internal successors, (114), 112 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-01-31 21:51:13,116 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 110 [2022-01-31 21:51:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:51:13,117 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-01-31 21:51:13,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 103 states have internal predecessors, (107), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-01-31 21:51:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 21:51:13,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:51:13,117 INFO L514 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:51:13,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-01-31 21:51:13,117 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:51:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:51:13,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1576007434, now seen corresponding path program 100 times [2022-01-31 21:51:13,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:51:13,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463087454] [2022-01-31 21:51:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:51:13,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:51:13,118 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:51:13,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:51:13,119 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:51:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:16,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:51:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:51:16,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:51:16,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463087454] [2022-01-31 21:51:16,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463087454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:51:16,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:51:16,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 21:51:16,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561679487] [2022-01-31 21:51:16,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:51:16,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 21:51:16,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:51:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 21:51:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 21:51:16,633 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 104 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 103 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:51:20,282 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2022-01-31 21:51:20,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 21:51:20,282 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 103 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:51:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:51:20,283 INFO L225 Difference]: With dead ends: 119 [2022-01-31 21:51:20,283 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 21:51:20,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 3 SyntacticMatches, 1 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 21:51:20,284 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:51:20,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:51:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 21:51:20,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-01-31 21:51:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 111 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-01-31 21:51:20,293 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 111 [2022-01-31 21:51:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:51:20,293 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-01-31 21:51:20,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 103 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-01-31 21:51:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 21:51:20,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:51:20,293 INFO L514 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:51:20,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-01-31 21:51:20,293 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:51:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:51:20,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1575958615, now seen corresponding path program 101 times [2022-01-31 21:51:20,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:51:20,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191587712] [2022-01-31 21:51:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:51:20,294 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:51:20,294 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:51:20,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:51:20,295 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:51:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:23,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:51:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:23,795 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 21:51:23,795 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:51:23,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191587712] [2022-01-31 21:51:23,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191587712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:51:23,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:51:23,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 21:51:23,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250151627] [2022-01-31 21:51:23,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:51:23,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 21:51:23,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:51:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 21:51:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:51:23,797 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 105 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 104 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:51:29,451 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-01-31 21:51:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 21:51:29,452 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 104 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 21:51:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:51:29,452 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:51:29,452 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 21:51:29,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5351 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=15967, Invalid=26675, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 21:51:29,454 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:51:29,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:51:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 21:51:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-01-31 21:51:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 113 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-01-31 21:51:29,462 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2022-01-31 21:51:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:51:29,462 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-01-31 21:51:29,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 104 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-01-31 21:51:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 21:51:29,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:51:29,463 INFO L514 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:51:29,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2022-01-31 21:51:29,463 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:51:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:51:29,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1610073738, now seen corresponding path program 101 times [2022-01-31 21:51:29,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:51:29,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447707392] [2022-01-31 21:51:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:51:29,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:51:29,464 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:51:29,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:51:29,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:51:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:51:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:33,027 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 21:51:33,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:51:33,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447707392] [2022-01-31 21:51:33,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447707392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:51:33,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:51:33,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 21:51:33,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107554426] [2022-01-31 21:51:33,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:51:33,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 21:51:33,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:51:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 21:51:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 21:51:33,029 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 104 states have internal predecessors, (109), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:51:36,751 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-01-31 21:51:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 21:51:36,752 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 104 states have internal predecessors, (109), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-01-31 21:51:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:51:36,752 INFO L225 Difference]: With dead ends: 120 [2022-01-31 21:51:36,752 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:51:36,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 21:51:36,754 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:51:36,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:51:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:51:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-31 21:51:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.018018018018018) internal successors, (113), 112 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2022-01-31 21:51:36,762 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2022-01-31 21:51:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:51:36,763 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2022-01-31 21:51:36,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 104 states have internal predecessors, (109), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2022-01-31 21:51:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 21:51:36,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:51:36,763 INFO L514 BasicCegarLoop]: trace histogram [102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:51:36,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2022-01-31 21:51:36,763 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:51:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:51:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1610024919, now seen corresponding path program 102 times [2022-01-31 21:51:36,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:51:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508757312] [2022-01-31 21:51:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:51:36,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:51:36,764 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:51:36,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:51:36,765 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:51:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:40,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:51:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:40,294 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 21:51:40,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:51:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508757312] [2022-01-31 21:51:40,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [508757312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:51:40,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:51:40,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 21:51:40,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707362593] [2022-01-31 21:51:40,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:51:40,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 21:51:40,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:51:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 21:51:40,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5360, Invalid=5770, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 21:51:40,296 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand has 106 states, 106 states have (on average 1.028301886792453) internal successors, (109), 105 states have internal predecessors, (109), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:46,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:51:46,053 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2022-01-31 21:51:46,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 21:51:46,054 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.028301886792453) internal successors, (109), 105 states have internal predecessors, (109), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-01-31 21:51:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:51:46,054 INFO L225 Difference]: With dead ends: 123 [2022-01-31 21:51:46,054 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 21:51:46,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5455 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=16278, Invalid=27194, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 21:51:46,056 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:51:46,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:51:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 21:51:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-01-31 21:51:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 114 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-01-31 21:51:46,064 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 112 [2022-01-31 21:51:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:51:46,065 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-01-31 21:51:46,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.028301886792453) internal successors, (109), 105 states have internal predecessors, (109), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-01-31 21:51:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 21:51:46,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:51:46,065 INFO L514 BasicCegarLoop]: trace histogram [102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:51:46,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2022-01-31 21:51:46,065 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:51:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:51:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1628838134, now seen corresponding path program 102 times [2022-01-31 21:51:46,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:51:46,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691966549] [2022-01-31 21:51:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:51:46,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:51:46,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:51:46,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:51:46,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:51:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:49,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:51:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:49,670 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 21:51:49,671 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:51:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691966549] [2022-01-31 21:51:49,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [691966549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:51:49,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:51:49,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 21:51:49,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334815046] [2022-01-31 21:51:49,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:51:49,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 21:51:49,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:51:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 21:51:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 21:51:49,672 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 106 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 105 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:51:53,506 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2022-01-31 21:51:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 21:51:53,506 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 105 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 21:51:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:51:53,507 INFO L225 Difference]: With dead ends: 121 [2022-01-31 21:51:53,507 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 21:51:53,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 21:51:53,509 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:51:53,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:51:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 21:51:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-01-31 21:51:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 113 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-01-31 21:51:53,517 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 113 [2022-01-31 21:51:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:51:53,517 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-01-31 21:51:53,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 105 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:51:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-01-31 21:51:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 21:51:53,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:51:53,518 INFO L514 BasicCegarLoop]: trace histogram [103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:51:53,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2022-01-31 21:51:53,518 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:51:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:51:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1628886953, now seen corresponding path program 103 times [2022-01-31 21:51:53,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:51:53,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486595827] [2022-01-31 21:51:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:51:53,519 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:51:53,519 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:51:53,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:51:53,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:51:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:57,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:51:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:51:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:51:57,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:51:57,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486595827] [2022-01-31 21:51:57,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [486595827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:51:57,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:51:57,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 21:51:57,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120009581] [2022-01-31 21:51:57,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:51:57,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 21:51:57,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:51:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 21:51:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5464, Invalid=5878, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:51:57,235 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 107 states, 107 states have (on average 1.02803738317757) internal successors, (110), 106 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:52:03,212 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-01-31 21:52:03,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 21:52:03,213 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.02803738317757) internal successors, (110), 106 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 21:52:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:52:03,213 INFO L225 Difference]: With dead ends: 124 [2022-01-31 21:52:03,213 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 21:52:03,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5560 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=16592, Invalid=27718, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 21:52:03,215 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:52:03,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:52:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 21:52:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-01-31 21:52:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 115 states have internal predecessors, (117), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-01-31 21:52:03,224 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 113 [2022-01-31 21:52:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:52:03,224 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-01-31 21:52:03,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.02803738317757) internal successors, (110), 106 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-01-31 21:52:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 21:52:03,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:52:03,224 INFO L514 BasicCegarLoop]: trace histogram [103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:52:03,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2022-01-31 21:52:03,224 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:52:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:52:03,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1044108938, now seen corresponding path program 103 times [2022-01-31 21:52:03,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:52:03,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161377476] [2022-01-31 21:52:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:52:03,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:52:03,225 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:52:03,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:52:03,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:52:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:52:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:06,968 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 21:52:06,968 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:52:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161377476] [2022-01-31 21:52:06,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1161377476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:52:06,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:52:06,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 21:52:06,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002237245] [2022-01-31 21:52:06,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:52:06,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 21:52:06,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:52:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 21:52:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:52:06,971 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 107 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 106 states have internal predecessors, (111), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:52:10,888 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-01-31 21:52:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 21:52:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 106 states have internal predecessors, (111), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 21:52:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:52:10,889 INFO L225 Difference]: With dead ends: 122 [2022-01-31 21:52:10,889 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 21:52:10,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 21:52:10,891 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:52:10,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:52:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 21:52:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-01-31 21:52:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 114 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-01-31 21:52:10,900 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 114 [2022-01-31 21:52:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:52:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-01-31 21:52:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 106 states have internal predecessors, (111), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-01-31 21:52:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 21:52:10,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:52:10,901 INFO L514 BasicCegarLoop]: trace histogram [104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:52:10,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-01-31 21:52:10,901 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:52:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:52:10,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1044060119, now seen corresponding path program 104 times [2022-01-31 21:52:10,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:52:10,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573024469] [2022-01-31 21:52:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:52:10,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:52:10,902 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:52:10,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:52:10,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:52:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:14,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:52:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:14,629 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 21:52:14,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:52:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573024469] [2022-01-31 21:52:14,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [573024469] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:52:14,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:52:14,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 21:52:14,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505517490] [2022-01-31 21:52:14,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:52:14,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 21:52:14,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:52:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 21:52:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5569, Invalid=5987, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:52:14,632 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 108 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 107 states have internal predecessors, (111), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:52:20,670 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2022-01-31 21:52:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 21:52:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 107 states have internal predecessors, (111), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 21:52:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:52:20,671 INFO L225 Difference]: With dead ends: 125 [2022-01-31 21:52:20,671 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 21:52:20,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5666 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=16909, Invalid=28247, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 21:52:20,673 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:52:20,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:52:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 21:52:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-01-31 21:52:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 116 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-01-31 21:52:20,682 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 114 [2022-01-31 21:52:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:52:20,682 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-01-31 21:52:20,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 107 states have internal predecessors, (111), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-01-31 21:52:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 21:52:20,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:52:20,683 INFO L514 BasicCegarLoop]: trace histogram [104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:52:20,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-01-31 21:52:20,683 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:52:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:52:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1993877750, now seen corresponding path program 104 times [2022-01-31 21:52:20,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:52:20,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901239430] [2022-01-31 21:52:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:52:20,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:52:20,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:52:20,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:52:20,685 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:52:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:52:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:24,502 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 21:52:24,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:52:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901239430] [2022-01-31 21:52:24,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901239430] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:52:24,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:52:24,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 21:52:24,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084941431] [2022-01-31 21:52:24,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:52:24,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 21:52:24,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:52:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 21:52:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:52:24,504 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 108 states, 108 states have (on average 1.037037037037037) internal successors, (112), 107 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:52:28,525 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2022-01-31 21:52:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 21:52:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.037037037037037) internal successors, (112), 107 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 21:52:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:52:28,526 INFO L225 Difference]: With dead ends: 123 [2022-01-31 21:52:28,526 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 21:52:28,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 21:52:28,528 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:52:28,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:52:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 21:52:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-01-31 21:52:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 115 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-01-31 21:52:28,536 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2022-01-31 21:52:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:52:28,537 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-01-31 21:52:28,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.037037037037037) internal successors, (112), 107 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-01-31 21:52:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 21:52:28,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:52:28,537 INFO L514 BasicCegarLoop]: trace histogram [105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:52:28,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-01-31 21:52:28,537 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:52:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:52:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1993926569, now seen corresponding path program 105 times [2022-01-31 21:52:28,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:52:28,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411166891] [2022-01-31 21:52:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:52:28,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:52:28,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:52:28,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:52:28,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:52:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:32,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:52:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:32,355 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 21:52:32,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:52:32,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411166891] [2022-01-31 21:52:32,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [411166891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:52:32,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:52:32,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 21:52:32,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719590553] [2022-01-31 21:52:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:52:32,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 21:52:32,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:52:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 21:52:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5675, Invalid=6097, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:52:32,357 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 109 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 108 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:52:38,531 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-01-31 21:52:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 21:52:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 108 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 21:52:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:52:38,531 INFO L225 Difference]: With dead ends: 126 [2022-01-31 21:52:38,531 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 21:52:38,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5773 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=17229, Invalid=28781, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 21:52:38,533 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:52:38,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:52:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 21:52:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2022-01-31 21:52:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 117 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-01-31 21:52:38,542 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 115 [2022-01-31 21:52:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:52:38,542 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-01-31 21:52:38,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 108 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-01-31 21:52:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 21:52:38,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:52:38,543 INFO L514 BasicCegarLoop]: trace histogram [105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:52:38,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2022-01-31 21:52:38,543 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:52:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:52:38,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1682184566, now seen corresponding path program 105 times [2022-01-31 21:52:38,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:52:38,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926194477] [2022-01-31 21:52:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:52:38,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:52:38,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:52:38,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:52:38,544 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:52:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:42,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:52:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:42,421 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 21:52:42,421 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:52:42,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926194477] [2022-01-31 21:52:42,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [926194477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:52:42,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:52:42,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 21:52:42,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80275563] [2022-01-31 21:52:42,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:52:42,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 21:52:42,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:52:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 21:52:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:52:42,423 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 109 states, 109 states have (on average 1.036697247706422) internal successors, (113), 108 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:52:46,496 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-01-31 21:52:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 21:52:46,496 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.036697247706422) internal successors, (113), 108 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 21:52:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:52:46,497 INFO L225 Difference]: With dead ends: 124 [2022-01-31 21:52:46,497 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 21:52:46,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 21:52:46,500 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:52:46,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:52:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 21:52:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-01-31 21:52:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.017391304347826) internal successors, (117), 116 states have internal predecessors, (117), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2022-01-31 21:52:46,515 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 116 [2022-01-31 21:52:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:52:46,515 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2022-01-31 21:52:46,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.036697247706422) internal successors, (113), 108 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:46,515 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2022-01-31 21:52:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 21:52:46,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:52:46,516 INFO L514 BasicCegarLoop]: trace histogram [106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:52:46,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2022-01-31 21:52:46,516 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:52:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:52:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1682233385, now seen corresponding path program 106 times [2022-01-31 21:52:46,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:52:46,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443579265] [2022-01-31 21:52:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:52:46,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:52:46,517 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:52:46,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:52:46,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:52:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:50,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:52:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:52:50,404 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 21:52:50,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:52:50,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443579265] [2022-01-31 21:52:50,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443579265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:52:50,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:52:50,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 21:52:50,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491719976] [2022-01-31 21:52:50,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:52:50,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 21:52:50,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:52:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 21:52:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5782, Invalid=6208, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 21:52:50,406 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 110 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 109 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:52:56,712 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2022-01-31 21:52:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 21:52:56,712 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 109 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 21:52:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:52:56,712 INFO L225 Difference]: With dead ends: 127 [2022-01-31 21:52:56,712 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 21:52:56,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5881 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=17552, Invalid=29320, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 21:52:56,714 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:52:56,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:52:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 21:52:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-01-31 21:52:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 118 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-01-31 21:52:56,724 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2022-01-31 21:52:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:52:56,724 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-01-31 21:52:56,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 109 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:52:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-01-31 21:52:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 21:52:56,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:52:56,724 INFO L514 BasicCegarLoop]: trace histogram [106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:52:56,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2022-01-31 21:52:56,724 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:52:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:52:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 609630454, now seen corresponding path program 106 times [2022-01-31 21:52:56,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:52:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992724745] [2022-01-31 21:52:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:52:56,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:52:56,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-01-31 21:52:56,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:52:56,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:52:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat