/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/locks/test_locks_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 19:55:14,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 19:55:14,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 19:55:14,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 19:55:14,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 19:55:14,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 19:55:14,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 19:55:14,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 19:55:14,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 19:55:14,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 19:55:14,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 19:55:14,322 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 19:55:14,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 19:55:14,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 19:55:14,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 19:55:14,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 19:55:14,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 19:55:14,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 19:55:14,323 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 19:55:14,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 19:55:14,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 19:55:14,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 19:55:14,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 19:55:14,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 19:55:14,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 19:55:14,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 19:55:14,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:55:14,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 19:55:14,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 19:55:14,324 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 19:55:14,325 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 19:55:14,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 19:55:14,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 19:55:14,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 19:55:14,493 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 19:55:14,493 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 19:55:14,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_13.c [2022-02-23 19:55:14,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a6a3b8d/a9272635270d40c7a7a81fc2325156de/FLAG2139cfd75 [2022-02-23 19:55:14,858 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 19:55:14,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c [2022-02-23 19:55:14,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a6a3b8d/a9272635270d40c7a7a81fc2325156de/FLAG2139cfd75 [2022-02-23 19:55:15,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28a6a3b8d/a9272635270d40c7a7a81fc2325156de [2022-02-23 19:55:15,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 19:55:15,299 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 19:55:15,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 19:55:15,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 19:55:15,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 19:55:15,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ac211b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15, skipping insertion in model container [2022-02-23 19:55:15,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 19:55:15,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 19:55:15,472 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c[4936,4949] [2022-02-23 19:55:15,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:55:15,480 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 19:55:15,496 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c[4936,4949] [2022-02-23 19:55:15,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:55:15,505 INFO L208 MainTranslator]: Completed translation [2022-02-23 19:55:15,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15 WrapperNode [2022-02-23 19:55:15,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 19:55:15,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 19:55:15,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 19:55:15,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 19:55:15,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 19:55:15,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 19:55:15,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 19:55:15,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 19:55:15,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:55:15,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:55:15,561 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) [2022-02-23 19:55:15,571 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 [2022-02-23 19:55:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 19:55:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 19:55:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 19:55:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 19:55:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 19:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 19:55:15,637 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 19:55:15,638 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 19:55:15,800 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 19:55:15,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 19:55:15,805 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 19:55:15,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:55:15 BoogieIcfgContainer [2022-02-23 19:55:15,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 19:55:15,807 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 19:55:15,807 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 19:55:15,808 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 19:55:15,810 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:55:15" (1/1) ... [2022-02-23 19:55:15,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:55:15 BasicIcfg [2022-02-23 19:55:15,838 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 19:55:15,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 19:55:15,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 19:55:15,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 19:55:15,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:55:15" (1/4) ... [2022-02-23 19:55:15,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fe6b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:55:15, skipping insertion in model container [2022-02-23 19:55:15,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:15" (2/4) ... [2022-02-23 19:55:15,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fe6b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:55:15, skipping insertion in model container [2022-02-23 19:55:15,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:55:15" (3/4) ... [2022-02-23 19:55:15,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fe6b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:55:15, skipping insertion in model container [2022-02-23 19:55:15,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:55:15" (4/4) ... [2022-02-23 19:55:15,850 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.cJordan [2022-02-23 19:55:15,854 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 19:55:15,855 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 19:55:15,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 19:55:15,893 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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=FAST_UPR [2022-02-23 19:55:15,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 19:55:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 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) [2022-02-23 19:55:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 19:55:15,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:15,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:15,909 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1381361359, now seen corresponding path program 1 times [2022-02-23 19:55:15,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:15,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385529378] [2022-02-23 19:55:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:16,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:16,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385529378] [2022-02-23 19:55:16,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385529378] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:16,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:16,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:16,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203277597] [2022-02-23 19:55:16,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:16,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:16,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:16,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:16,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:16,161 INFO L87 Difference]: Start difference. First operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 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 5.25) internal successors, (21), 3 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) [2022-02-23 19:55:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:16,351 INFO L93 Difference]: Finished difference Result 99 states and 174 transitions. [2022-02-23 19:55:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2022-02-23 19:55:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:16,358 INFO L225 Difference]: With dead ends: 99 [2022-02-23 19:55:16,359 INFO L226 Difference]: Without dead ends: 91 [2022-02-23 19:55:16,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:16,362 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 225 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:16,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 107 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-23 19:55:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-02-23 19:55:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.88135593220339) internal successors, (111), 59 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) [2022-02-23 19:55:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2022-02-23 19:55:16,390 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 24 [2022-02-23 19:55:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:16,390 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2022-02-23 19:55:16,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-02-23 19:55:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2022-02-23 19:55:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 19:55:16,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:16,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:16,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 19:55:16,392 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:16,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1891895536, now seen corresponding path program 1 times [2022-02-23 19:55:16,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:16,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464691435] [2022-02-23 19:55:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:16,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:16,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:16,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464691435] [2022-02-23 19:55:16,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464691435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:16,475 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:16,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:16,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392456861] [2022-02-23 19:55:16,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:16,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:16,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:16,477 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-02-23 19:55:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:16,565 INFO L93 Difference]: Finished difference Result 91 states and 163 transitions. [2022-02-23 19:55:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:16,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2022-02-23 19:55:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:16,569 INFO L225 Difference]: With dead ends: 91 [2022-02-23 19:55:16,570 INFO L226 Difference]: Without dead ends: 91 [2022-02-23 19:55:16,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:16,572 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:16,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 119 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-23 19:55:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-02-23 19:55:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 85 states have internal predecessors, (159), 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) [2022-02-23 19:55:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 162 transitions. [2022-02-23 19:55:16,579 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 162 transitions. Word has length 24 [2022-02-23 19:55:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:16,580 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 162 transitions. [2022-02-23 19:55:16,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-02-23 19:55:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 162 transitions. [2022-02-23 19:55:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 19:55:16,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:16,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:16,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 19:55:16,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 127502905, now seen corresponding path program 1 times [2022-02-23 19:55:16,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:16,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835094170] [2022-02-23 19:55:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:16,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:16,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:16,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835094170] [2022-02-23 19:55:16,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835094170] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:16,635 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:16,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:16,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489214116] [2022-02-23 19:55:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:16,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:16,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:16,637 INFO L87 Difference]: Start difference. First operand 89 states and 162 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-02-23 19:55:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:16,757 INFO L93 Difference]: Finished difference Result 94 states and 165 transitions. [2022-02-23 19:55:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:16,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2022-02-23 19:55:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:16,759 INFO L225 Difference]: With dead ends: 94 [2022-02-23 19:55:16,759 INFO L226 Difference]: Without dead ends: 94 [2022-02-23 19:55:16,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:16,760 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:16,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-23 19:55:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-02-23 19:55:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.8295454545454546) internal successors, (161), 88 states have internal predecessors, (161), 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) [2022-02-23 19:55:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 164 transitions. [2022-02-23 19:55:16,776 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 164 transitions. Word has length 25 [2022-02-23 19:55:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:16,776 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 164 transitions. [2022-02-23 19:55:16,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-02-23 19:55:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 164 transitions. [2022-02-23 19:55:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 19:55:16,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:16,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:16,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 19:55:16,778 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:16,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1480812602, now seen corresponding path program 1 times [2022-02-23 19:55:16,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:16,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554526883] [2022-02-23 19:55:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:16,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:16,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554526883] [2022-02-23 19:55:16,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554526883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:16,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:16,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:16,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45018547] [2022-02-23 19:55:16,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:16,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:16,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:16,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:16,840 INFO L87 Difference]: Start difference. First operand 92 states and 164 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-02-23 19:55:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:16,916 INFO L93 Difference]: Finished difference Result 171 states and 310 transitions. [2022-02-23 19:55:16,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:16,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2022-02-23 19:55:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:16,922 INFO L225 Difference]: With dead ends: 171 [2022-02-23 19:55:16,922 INFO L226 Difference]: Without dead ends: 171 [2022-02-23 19:55:16,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:16,931 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 212 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:16,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-23 19:55:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 121. [2022-02-23 19:55:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.829059829059829) internal successors, (214), 117 states have internal predecessors, (214), 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) [2022-02-23 19:55:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 217 transitions. [2022-02-23 19:55:16,940 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 217 transitions. Word has length 25 [2022-02-23 19:55:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:16,940 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 217 transitions. [2022-02-23 19:55:16,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-02-23 19:55:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 217 transitions. [2022-02-23 19:55:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 19:55:16,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:16,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:16,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 19:55:16,941 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 970278425, now seen corresponding path program 1 times [2022-02-23 19:55:16,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:16,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616404856] [2022-02-23 19:55:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616404856] [2022-02-23 19:55:17,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616404856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,026 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089728773] [2022-02-23 19:55:17,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,028 INFO L87 Difference]: Start difference. First operand 121 states and 217 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-02-23 19:55:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:17,109 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2022-02-23 19:55:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:17,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 [2022-02-23 19:55:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:17,111 INFO L225 Difference]: With dead ends: 173 [2022-02-23 19:55:17,112 INFO L226 Difference]: Without dead ends: 173 [2022-02-23 19:55:17,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:17,114 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:17,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 121 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-23 19:55:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-02-23 19:55:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.8203592814371257) internal successors, (304), 167 states have internal predecessors, (304), 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) [2022-02-23 19:55:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 307 transitions. [2022-02-23 19:55:17,130 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 307 transitions. Word has length 25 [2022-02-23 19:55:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:17,130 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 307 transitions. [2022-02-23 19:55:17,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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) [2022-02-23 19:55:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 307 transitions. [2022-02-23 19:55:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 19:55:17,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:17,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:17,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-23 19:55:17,133 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:17,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1339417396, now seen corresponding path program 1 times [2022-02-23 19:55:17,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:17,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869722449] [2022-02-23 19:55:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:17,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869722449] [2022-02-23 19:55:17,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869722449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855648433] [2022-02-23 19:55:17,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,183 INFO L87 Difference]: Start difference. First operand 171 states and 307 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2022-02-23 19:55:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:17,250 INFO L93 Difference]: Finished difference Result 175 states and 308 transitions. [2022-02-23 19:55:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:17,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2022-02-23 19:55:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:17,253 INFO L225 Difference]: With dead ends: 175 [2022-02-23 19:55:17,253 INFO L226 Difference]: Without dead ends: 175 [2022-02-23 19:55:17,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:17,255 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:17,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 140 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-23 19:55:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-02-23 19:55:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.7988165680473374) internal successors, (304), 169 states have internal predecessors, (304), 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) [2022-02-23 19:55:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 307 transitions. [2022-02-23 19:55:17,272 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 307 transitions. Word has length 26 [2022-02-23 19:55:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:17,273 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 307 transitions. [2022-02-23 19:55:17,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2022-02-23 19:55:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 307 transitions. [2022-02-23 19:55:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 19:55:17,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:17,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:17,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-23 19:55:17,274 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:17,274 INFO L85 PathProgramCache]: Analyzing trace with hash 13892301, now seen corresponding path program 1 times [2022-02-23 19:55:17,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:17,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528384852] [2022-02-23 19:55:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:17,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528384852] [2022-02-23 19:55:17,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528384852] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,324 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480865281] [2022-02-23 19:55:17,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,326 INFO L87 Difference]: Start difference. First operand 173 states and 307 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2022-02-23 19:55:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:17,414 INFO L93 Difference]: Finished difference Result 331 states and 584 transitions. [2022-02-23 19:55:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2022-02-23 19:55:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:17,416 INFO L225 Difference]: With dead ends: 331 [2022-02-23 19:55:17,417 INFO L226 Difference]: Without dead ends: 331 [2022-02-23 19:55:17,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:17,419 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 209 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:17,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 98 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-23 19:55:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2022-02-23 19:55:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.7846153846153847) internal successors, (580), 325 states have internal predecessors, (580), 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) [2022-02-23 19:55:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 583 transitions. [2022-02-23 19:55:17,431 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 583 transitions. Word has length 26 [2022-02-23 19:55:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:17,431 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 583 transitions. [2022-02-23 19:55:17,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2022-02-23 19:55:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 583 transitions. [2022-02-23 19:55:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 19:55:17,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:17,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:17,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-23 19:55:17,433 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash 524426478, now seen corresponding path program 1 times [2022-02-23 19:55:17,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:17,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466997149] [2022-02-23 19:55:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466997149] [2022-02-23 19:55:17,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466997149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879162081] [2022-02-23 19:55:17,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,477 INFO L87 Difference]: Start difference. First operand 329 states and 583 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2022-02-23 19:55:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:17,551 INFO L93 Difference]: Finished difference Result 419 states and 748 transitions. [2022-02-23 19:55:17,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2022-02-23 19:55:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:17,557 INFO L225 Difference]: With dead ends: 419 [2022-02-23 19:55:17,561 INFO L226 Difference]: Without dead ends: 419 [2022-02-23 19:55:17,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:17,563 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 135 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:17,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-23 19:55:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 329. [2022-02-23 19:55:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.7723076923076924) internal successors, (576), 325 states have internal predecessors, (576), 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) [2022-02-23 19:55:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 579 transitions. [2022-02-23 19:55:17,573 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 579 transitions. Word has length 26 [2022-02-23 19:55:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:17,573 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 579 transitions. [2022-02-23 19:55:17,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2022-02-23 19:55:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 579 transitions. [2022-02-23 19:55:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 19:55:17,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:17,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:17,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-23 19:55:17,580 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 430693653, now seen corresponding path program 1 times [2022-02-23 19:55:17,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:17,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073738796] [2022-02-23 19:55:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:17,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073738796] [2022-02-23 19:55:17,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073738796] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668725077] [2022-02-23 19:55:17,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,635 INFO L87 Difference]: Start difference. First operand 329 states and 579 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-23 19:55:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:17,709 INFO L93 Difference]: Finished difference Result 615 states and 1092 transitions. [2022-02-23 19:55:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:17,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 [2022-02-23 19:55:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:17,713 INFO L225 Difference]: With dead ends: 615 [2022-02-23 19:55:17,713 INFO L226 Difference]: Without dead ends: 615 [2022-02-23 19:55:17,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:17,716 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 198 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:17,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-02-23 19:55:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 453. [2022-02-23 19:55:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 449 states have (on average 1.7461024498886415) internal successors, (784), 449 states have internal predecessors, (784), 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) [2022-02-23 19:55:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 787 transitions. [2022-02-23 19:55:17,729 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 787 transitions. Word has length 27 [2022-02-23 19:55:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:17,729 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 787 transitions. [2022-02-23 19:55:17,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-23 19:55:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 787 transitions. [2022-02-23 19:55:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 19:55:17,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:17,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:17,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-23 19:55:17,732 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash -79840524, now seen corresponding path program 1 times [2022-02-23 19:55:17,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:17,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848951626] [2022-02-23 19:55:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:17,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848951626] [2022-02-23 19:55:17,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848951626] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,785 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656498805] [2022-02-23 19:55:17,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,786 INFO L87 Difference]: Start difference. First operand 453 states and 787 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-23 19:55:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:17,855 INFO L93 Difference]: Finished difference Result 639 states and 1104 transitions. [2022-02-23 19:55:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:17,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 [2022-02-23 19:55:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:17,858 INFO L225 Difference]: With dead ends: 639 [2022-02-23 19:55:17,858 INFO L226 Difference]: Without dead ends: 639 [2022-02-23 19:55:17,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:17,860 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:17,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 125 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-23 19:55:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2022-02-23 19:55:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 633 states have (on average 1.7377567140600316) internal successors, (1100), 633 states have internal predecessors, (1100), 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) [2022-02-23 19:55:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1103 transitions. [2022-02-23 19:55:17,875 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1103 transitions. Word has length 27 [2022-02-23 19:55:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:17,876 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1103 transitions. [2022-02-23 19:55:17,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-02-23 19:55:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1103 transitions. [2022-02-23 19:55:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 19:55:17,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:17,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:17,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-23 19:55:17,878 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash 466633801, now seen corresponding path program 1 times [2022-02-23 19:55:17,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:17,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561617159] [2022-02-23 19:55:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:17,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561617159] [2022-02-23 19:55:17,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561617159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,927 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662601205] [2022-02-23 19:55:17,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,934 INFO L87 Difference]: Start difference. First operand 637 states and 1103 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2022-02-23 19:55:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:18,027 INFO L93 Difference]: Finished difference Result 651 states and 1112 transitions. [2022-02-23 19:55:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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 [2022-02-23 19:55:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:18,030 INFO L225 Difference]: With dead ends: 651 [2022-02-23 19:55:18,031 INFO L226 Difference]: Without dead ends: 651 [2022-02-23 19:55:18,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:18,031 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:18,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 134 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-23 19:55:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2022-02-23 19:55:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 645 states have (on average 1.7178294573643411) internal successors, (1108), 645 states have internal predecessors, (1108), 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) [2022-02-23 19:55:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1111 transitions. [2022-02-23 19:55:18,046 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1111 transitions. Word has length 28 [2022-02-23 19:55:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:18,046 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1111 transitions. [2022-02-23 19:55:18,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2022-02-23 19:55:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1111 transitions. [2022-02-23 19:55:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 19:55:18,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:18,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:18,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-23 19:55:18,047 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:18,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1819943498, now seen corresponding path program 1 times [2022-02-23 19:55:18,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:18,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114098667] [2022-02-23 19:55:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:18,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:18,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:18,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114098667] [2022-02-23 19:55:18,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114098667] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:18,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:18,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:18,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048541849] [2022-02-23 19:55:18,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:18,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:18,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:18,098 INFO L87 Difference]: Start difference. First operand 649 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2022-02-23 19:55:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:18,161 INFO L93 Difference]: Finished difference Result 1195 states and 2064 transitions. [2022-02-23 19:55:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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 [2022-02-23 19:55:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:18,165 INFO L225 Difference]: With dead ends: 1195 [2022-02-23 19:55:18,165 INFO L226 Difference]: Without dead ends: 1195 [2022-02-23 19:55:18,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:18,166 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:18,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-23 19:55:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-02-23 19:55:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 901 states have (on average 1.6825749167591566) internal successors, (1516), 901 states have internal predecessors, (1516), 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) [2022-02-23 19:55:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1519 transitions. [2022-02-23 19:55:18,187 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1519 transitions. Word has length 28 [2022-02-23 19:55:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:18,187 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1519 transitions. [2022-02-23 19:55:18,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2022-02-23 19:55:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1519 transitions. [2022-02-23 19:55:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 19:55:18,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:18,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:18,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-23 19:55:18,189 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1309409321, now seen corresponding path program 1 times [2022-02-23 19:55:18,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:18,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123197091] [2022-02-23 19:55:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:18,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:18,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:18,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123197091] [2022-02-23 19:55:18,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123197091] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:18,223 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:18,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:18,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823538303] [2022-02-23 19:55:18,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:18,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:18,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:18,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:18,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:18,224 INFO L87 Difference]: Start difference. First operand 905 states and 1519 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2022-02-23 19:55:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:18,289 INFO L93 Difference]: Finished difference Result 1259 states and 2104 transitions. [2022-02-23 19:55:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:18,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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 [2022-02-23 19:55:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:18,293 INFO L225 Difference]: With dead ends: 1259 [2022-02-23 19:55:18,293 INFO L226 Difference]: Without dead ends: 1259 [2022-02-23 19:55:18,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:18,294 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:18,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-02-23 19:55:18,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1257. [2022-02-23 19:55:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1253 states have (on average 1.675977653631285) internal successors, (2100), 1253 states have internal predecessors, (2100), 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) [2022-02-23 19:55:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2103 transitions. [2022-02-23 19:55:18,314 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2103 transitions. Word has length 28 [2022-02-23 19:55:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:18,315 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 2103 transitions. [2022-02-23 19:55:18,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2022-02-23 19:55:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2103 transitions. [2022-02-23 19:55:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:55:18,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:18,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:18,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-23 19:55:18,316 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 583706160, now seen corresponding path program 1 times [2022-02-23 19:55:18,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:18,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167801280] [2022-02-23 19:55:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:18,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:18,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:18,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167801280] [2022-02-23 19:55:18,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167801280] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:18,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:18,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:18,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854341484] [2022-02-23 19:55:18,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:18,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:18,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:18,362 INFO L87 Difference]: Start difference. First operand 1257 states and 2103 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) [2022-02-23 19:55:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:18,423 INFO L93 Difference]: Finished difference Result 1275 states and 2104 transitions. [2022-02-23 19:55:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:18,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 [2022-02-23 19:55:18,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:18,427 INFO L225 Difference]: With dead ends: 1275 [2022-02-23 19:55:18,427 INFO L226 Difference]: Without dead ends: 1275 [2022-02-23 19:55:18,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:18,428 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:18,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-02-23 19:55:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-02-23 19:55:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1269 states have (on average 1.6548463356973995) internal successors, (2100), 1269 states have internal predecessors, (2100), 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) [2022-02-23 19:55:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2103 transitions. [2022-02-23 19:55:18,448 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2103 transitions. Word has length 29 [2022-02-23 19:55:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:18,448 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 2103 transitions. [2022-02-23 19:55:18,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) [2022-02-23 19:55:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2103 transitions. [2022-02-23 19:55:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:55:18,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:18,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:18,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-23 19:55:18,450 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1937015857, now seen corresponding path program 1 times [2022-02-23 19:55:18,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:18,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099630768] [2022-02-23 19:55:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:18,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:18,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099630768] [2022-02-23 19:55:18,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099630768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:18,483 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:18,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:18,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051093379] [2022-02-23 19:55:18,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:18,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:18,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:18,484 INFO L87 Difference]: Start difference. First operand 1273 states and 2103 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) [2022-02-23 19:55:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:18,549 INFO L93 Difference]: Finished difference Result 2315 states and 3864 transitions. [2022-02-23 19:55:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 [2022-02-23 19:55:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:18,555 INFO L225 Difference]: With dead ends: 2315 [2022-02-23 19:55:18,555 INFO L226 Difference]: Without dead ends: 2315 [2022-02-23 19:55:18,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:18,558 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:18,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-23 19:55:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1801. [2022-02-23 19:55:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1797 states have (on average 1.613800779076238) internal successors, (2900), 1797 states have internal predecessors, (2900), 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) [2022-02-23 19:55:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2903 transitions. [2022-02-23 19:55:18,591 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2903 transitions. Word has length 29 [2022-02-23 19:55:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 2903 transitions. [2022-02-23 19:55:18,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) [2022-02-23 19:55:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2903 transitions. [2022-02-23 19:55:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:55:18,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:18,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:18,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-23 19:55:18,594 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1426481680, now seen corresponding path program 1 times [2022-02-23 19:55:18,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:18,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512774920] [2022-02-23 19:55:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:18,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:18,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:18,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512774920] [2022-02-23 19:55:18,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512774920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:18,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:18,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:18,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418534865] [2022-02-23 19:55:18,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:18,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:18,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:18,631 INFO L87 Difference]: Start difference. First operand 1801 states and 2903 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) [2022-02-23 19:55:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:18,708 INFO L93 Difference]: Finished difference Result 2475 states and 3976 transitions. [2022-02-23 19:55:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:18,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 [2022-02-23 19:55:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:18,717 INFO L225 Difference]: With dead ends: 2475 [2022-02-23 19:55:18,717 INFO L226 Difference]: Without dead ends: 2475 [2022-02-23 19:55:18,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:18,718 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:18,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-02-23 19:55:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2473. [2022-02-23 19:55:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2469 states have (on average 1.608748481166464) internal successors, (3972), 2469 states have internal predecessors, (3972), 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) [2022-02-23 19:55:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3975 transitions. [2022-02-23 19:55:18,755 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3975 transitions. Word has length 29 [2022-02-23 19:55:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:18,755 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 3975 transitions. [2022-02-23 19:55:18,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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) [2022-02-23 19:55:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3975 transitions. [2022-02-23 19:55:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:55:18,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:18,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:18,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-23 19:55:18,758 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash -82017883, now seen corresponding path program 1 times [2022-02-23 19:55:18,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:18,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351220116] [2022-02-23 19:55:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:18,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:18,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:18,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351220116] [2022-02-23 19:55:18,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351220116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:18,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:18,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:18,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392142121] [2022-02-23 19:55:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:18,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:18,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:18,791 INFO L87 Difference]: Start difference. First operand 2473 states and 3975 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-23 19:55:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:18,872 INFO L93 Difference]: Finished difference Result 2507 states and 3976 transitions. [2022-02-23 19:55:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:18,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 [2022-02-23 19:55:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:18,879 INFO L225 Difference]: With dead ends: 2507 [2022-02-23 19:55:18,879 INFO L226 Difference]: Without dead ends: 2507 [2022-02-23 19:55:18,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:18,880 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:18,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 128 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-02-23 19:55:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2505. [2022-02-23 19:55:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2501 states have (on average 1.5881647341063574) internal successors, (3972), 2501 states have internal predecessors, (3972), 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) [2022-02-23 19:55:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3975 transitions. [2022-02-23 19:55:18,919 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3975 transitions. Word has length 30 [2022-02-23 19:55:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:18,919 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 3975 transitions. [2022-02-23 19:55:18,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-23 19:55:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3975 transitions. [2022-02-23 19:55:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:55:18,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:18,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:18,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-23 19:55:18,922 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:18,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1271291814, now seen corresponding path program 1 times [2022-02-23 19:55:18,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:18,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30729910] [2022-02-23 19:55:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:18,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:18,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:18,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30729910] [2022-02-23 19:55:18,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30729910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:18,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:18,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:18,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039703113] [2022-02-23 19:55:18,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:18,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:18,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:18,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:18,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:18,964 INFO L87 Difference]: Start difference. First operand 2505 states and 3975 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-23 19:55:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:19,046 INFO L93 Difference]: Finished difference Result 4491 states and 7208 transitions. [2022-02-23 19:55:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:19,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 [2022-02-23 19:55:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:19,058 INFO L225 Difference]: With dead ends: 4491 [2022-02-23 19:55:19,058 INFO L226 Difference]: Without dead ends: 4491 [2022-02-23 19:55:19,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:19,059 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:19,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-02-23 19:55:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 3593. [2022-02-23 19:55:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3589 states have (on average 1.5436054611312344) internal successors, (5540), 3589 states have internal predecessors, (5540), 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) [2022-02-23 19:55:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5543 transitions. [2022-02-23 19:55:19,121 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5543 transitions. Word has length 30 [2022-02-23 19:55:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:19,121 INFO L470 AbstractCegarLoop]: Abstraction has 3593 states and 5543 transitions. [2022-02-23 19:55:19,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-23 19:55:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5543 transitions. [2022-02-23 19:55:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:55:19,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:19,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:19,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-23 19:55:19,124 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash 760757637, now seen corresponding path program 1 times [2022-02-23 19:55:19,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:19,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617227866] [2022-02-23 19:55:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:19,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:19,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:19,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617227866] [2022-02-23 19:55:19,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617227866] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:19,165 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:19,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:19,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353327570] [2022-02-23 19:55:19,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:19,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:19,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:19,167 INFO L87 Difference]: Start difference. First operand 3593 states and 5543 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-23 19:55:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:19,239 INFO L93 Difference]: Finished difference Result 4875 states and 7496 transitions. [2022-02-23 19:55:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 [2022-02-23 19:55:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:19,268 INFO L225 Difference]: With dead ends: 4875 [2022-02-23 19:55:19,268 INFO L226 Difference]: Without dead ends: 4875 [2022-02-23 19:55:19,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:19,269 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:19,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-02-23 19:55:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4873. [2022-02-23 19:55:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 4869 states have (on average 1.538714315054426) internal successors, (7492), 4869 states have internal predecessors, (7492), 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) [2022-02-23 19:55:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7495 transitions. [2022-02-23 19:55:19,353 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7495 transitions. Word has length 30 [2022-02-23 19:55:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:19,354 INFO L470 AbstractCegarLoop]: Abstraction has 4873 states and 7495 transitions. [2022-02-23 19:55:19,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-02-23 19:55:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7495 transitions. [2022-02-23 19:55:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 19:55:19,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:19,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:19,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-23 19:55:19,359 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash 755373388, now seen corresponding path program 1 times [2022-02-23 19:55:19,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:19,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61601050] [2022-02-23 19:55:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:19,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:19,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61601050] [2022-02-23 19:55:19,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61601050] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:19,393 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:19,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:19,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259739388] [2022-02-23 19:55:19,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:19,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:19,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:19,394 INFO L87 Difference]: Start difference. First operand 4873 states and 7495 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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) [2022-02-23 19:55:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:19,467 INFO L93 Difference]: Finished difference Result 4939 states and 7496 transitions. [2022-02-23 19:55:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:19,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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 [2022-02-23 19:55:19,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:19,475 INFO L225 Difference]: With dead ends: 4939 [2022-02-23 19:55:19,475 INFO L226 Difference]: Without dead ends: 4939 [2022-02-23 19:55:19,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:19,476 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 164 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:19,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 125 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2022-02-23 19:55:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4937. [2022-02-23 19:55:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4933 states have (on average 1.5187512669774985) internal successors, (7492), 4933 states have internal predecessors, (7492), 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) [2022-02-23 19:55:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 7495 transitions. [2022-02-23 19:55:19,553 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 7495 transitions. Word has length 31 [2022-02-23 19:55:19,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:19,553 INFO L470 AbstractCegarLoop]: Abstraction has 4937 states and 7495 transitions. [2022-02-23 19:55:19,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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) [2022-02-23 19:55:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 7495 transitions. [2022-02-23 19:55:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 19:55:19,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:19,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:19,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-23 19:55:19,557 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2108683085, now seen corresponding path program 1 times [2022-02-23 19:55:19,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:19,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94076378] [2022-02-23 19:55:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:19,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:19,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94076378] [2022-02-23 19:55:19,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94076378] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:19,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:19,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:19,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647700964] [2022-02-23 19:55:19,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:19,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:19,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:19,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:19,581 INFO L87 Difference]: Start difference. First operand 4937 states and 7495 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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) [2022-02-23 19:55:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:19,681 INFO L93 Difference]: Finished difference Result 8715 states and 13384 transitions. [2022-02-23 19:55:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:19,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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 [2022-02-23 19:55:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:19,692 INFO L225 Difference]: With dead ends: 8715 [2022-02-23 19:55:19,692 INFO L226 Difference]: Without dead ends: 8715 [2022-02-23 19:55:19,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:19,693 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:19,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8715 states. [2022-02-23 19:55:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8715 to 7177. [2022-02-23 19:55:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7173 states have (on average 1.4727450160323434) internal successors, (10564), 7173 states have internal predecessors, (10564), 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) [2022-02-23 19:55:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10567 transitions. [2022-02-23 19:55:19,794 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10567 transitions. Word has length 31 [2022-02-23 19:55:19,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:19,795 INFO L470 AbstractCegarLoop]: Abstraction has 7177 states and 10567 transitions. [2022-02-23 19:55:19,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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) [2022-02-23 19:55:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10567 transitions. [2022-02-23 19:55:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 19:55:19,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:19,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:19,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-23 19:55:19,801 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1598148908, now seen corresponding path program 1 times [2022-02-23 19:55:19,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:19,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195525769] [2022-02-23 19:55:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:19,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:19,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:19,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195525769] [2022-02-23 19:55:19,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195525769] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:19,826 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:19,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:19,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596268361] [2022-02-23 19:55:19,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:19,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:19,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:19,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:19,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:19,827 INFO L87 Difference]: Start difference. First operand 7177 states and 10567 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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) [2022-02-23 19:55:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:19,907 INFO L93 Difference]: Finished difference Result 9611 states and 14088 transitions. [2022-02-23 19:55:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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 [2022-02-23 19:55:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:19,921 INFO L225 Difference]: With dead ends: 9611 [2022-02-23 19:55:19,921 INFO L226 Difference]: Without dead ends: 9611 [2022-02-23 19:55:19,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:19,922 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:19,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 133 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2022-02-23 19:55:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9609. [2022-02-23 19:55:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9609 states, 9605 states have (on average 1.4663196251952109) internal successors, (14084), 9605 states have internal predecessors, (14084), 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) [2022-02-23 19:55:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9609 states to 9609 states and 14087 transitions. [2022-02-23 19:55:20,068 INFO L78 Accepts]: Start accepts. Automaton has 9609 states and 14087 transitions. Word has length 31 [2022-02-23 19:55:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:20,069 INFO L470 AbstractCegarLoop]: Abstraction has 9609 states and 14087 transitions. [2022-02-23 19:55:20,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 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) [2022-02-23 19:55:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 9609 states and 14087 transitions. [2022-02-23 19:55:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 19:55:20,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:20,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:20,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-23 19:55:20,075 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash 944699137, now seen corresponding path program 1 times [2022-02-23 19:55:20,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:20,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007885508] [2022-02-23 19:55:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:20,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:20,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:20,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007885508] [2022-02-23 19:55:20,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007885508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:20,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:20,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:20,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371393519] [2022-02-23 19:55:20,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:20,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:20,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:20,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:20,103 INFO L87 Difference]: Start difference. First operand 9609 states and 14087 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2022-02-23 19:55:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:20,179 INFO L93 Difference]: Finished difference Result 9739 states and 14088 transitions. [2022-02-23 19:55:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:20,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 [2022-02-23 19:55:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:20,194 INFO L225 Difference]: With dead ends: 9739 [2022-02-23 19:55:20,194 INFO L226 Difference]: Without dead ends: 9739 [2022-02-23 19:55:20,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:20,195 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:20,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 122 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2022-02-23 19:55:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9737. [2022-02-23 19:55:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9733 states have (on average 1.4470358573923765) internal successors, (14084), 9733 states have internal predecessors, (14084), 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) [2022-02-23 19:55:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 14087 transitions. [2022-02-23 19:55:20,381 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 14087 transitions. Word has length 32 [2022-02-23 19:55:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:20,381 INFO L470 AbstractCegarLoop]: Abstraction has 9737 states and 14087 transitions. [2022-02-23 19:55:20,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2022-02-23 19:55:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 14087 transitions. [2022-02-23 19:55:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 19:55:20,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:20,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:20,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-23 19:55:20,389 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:20,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:20,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1996958462, now seen corresponding path program 1 times [2022-02-23 19:55:20,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:20,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652330055] [2022-02-23 19:55:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:20,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:20,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652330055] [2022-02-23 19:55:20,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652330055] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:20,414 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:20,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:20,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471096511] [2022-02-23 19:55:20,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:20,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:20,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:20,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:20,415 INFO L87 Difference]: Start difference. First operand 9737 states and 14087 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2022-02-23 19:55:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:20,505 INFO L93 Difference]: Finished difference Result 16907 states and 24712 transitions. [2022-02-23 19:55:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 [2022-02-23 19:55:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:20,533 INFO L225 Difference]: With dead ends: 16907 [2022-02-23 19:55:20,533 INFO L226 Difference]: Without dead ends: 16907 [2022-02-23 19:55:20,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:20,534 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:20,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16907 states. [2022-02-23 19:55:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16907 to 14345. [2022-02-23 19:55:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.4015759012621156) internal successors, (20100), 14341 states have internal predecessors, (20100), 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) [2022-02-23 19:55:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 20103 transitions. [2022-02-23 19:55:20,826 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 20103 transitions. Word has length 32 [2022-02-23 19:55:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:20,827 INFO L470 AbstractCegarLoop]: Abstraction has 14345 states and 20103 transitions. [2022-02-23 19:55:20,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2022-02-23 19:55:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 20103 transitions. [2022-02-23 19:55:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 19:55:20,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:20,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:20,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-23 19:55:20,840 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1787474657, now seen corresponding path program 1 times [2022-02-23 19:55:20,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:20,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954067536] [2022-02-23 19:55:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:20,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:20,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:20,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954067536] [2022-02-23 19:55:20,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954067536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:20,862 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:20,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:20,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922673026] [2022-02-23 19:55:20,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:20,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:20,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:20,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:20,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:20,863 INFO L87 Difference]: Start difference. First operand 14345 states and 20103 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2022-02-23 19:55:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:20,957 INFO L93 Difference]: Finished difference Result 18955 states and 26376 transitions. [2022-02-23 19:55:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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 [2022-02-23 19:55:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:21,057 INFO L225 Difference]: With dead ends: 18955 [2022-02-23 19:55:21,057 INFO L226 Difference]: Without dead ends: 18955 [2022-02-23 19:55:21,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:21,058 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:21,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 135 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18955 states. [2022-02-23 19:55:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18955 to 18953. [2022-02-23 19:55:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18953 states, 18949 states have (on average 1.3917357116470526) internal successors, (26372), 18949 states have internal predecessors, (26372), 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) [2022-02-23 19:55:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18953 states to 18953 states and 26375 transitions. [2022-02-23 19:55:21,270 INFO L78 Accepts]: Start accepts. Automaton has 18953 states and 26375 transitions. Word has length 32 [2022-02-23 19:55:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:21,270 INFO L470 AbstractCegarLoop]: Abstraction has 18953 states and 26375 transitions. [2022-02-23 19:55:21,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 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) [2022-02-23 19:55:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 18953 states and 26375 transitions. [2022-02-23 19:55:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 19:55:21,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:21,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:21,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-23 19:55:21,283 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1776137112, now seen corresponding path program 1 times [2022-02-23 19:55:21,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:21,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592907709] [2022-02-23 19:55:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:21,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:21,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:21,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592907709] [2022-02-23 19:55:21,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592907709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:21,310 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:21,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:21,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693077183] [2022-02-23 19:55:21,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:21,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:21,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:21,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:21,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:21,311 INFO L87 Difference]: Start difference. First operand 18953 states and 26375 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-02-23 19:55:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:21,412 INFO L93 Difference]: Finished difference Result 19211 states and 26376 transitions. [2022-02-23 19:55:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 [2022-02-23 19:55:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:21,438 INFO L225 Difference]: With dead ends: 19211 [2022-02-23 19:55:21,439 INFO L226 Difference]: Without dead ends: 19211 [2022-02-23 19:55:21,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:21,440 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 162 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:21,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19211 states. [2022-02-23 19:55:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19211 to 19209. [2022-02-23 19:55:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19209 states, 19205 states have (on average 1.37318406664931) internal successors, (26372), 19205 states have internal predecessors, (26372), 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) [2022-02-23 19:55:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19209 states to 19209 states and 26375 transitions. [2022-02-23 19:55:21,774 INFO L78 Accepts]: Start accepts. Automaton has 19209 states and 26375 transitions. Word has length 33 [2022-02-23 19:55:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:21,775 INFO L470 AbstractCegarLoop]: Abstraction has 19209 states and 26375 transitions. [2022-02-23 19:55:21,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-02-23 19:55:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 19209 states and 26375 transitions. [2022-02-23 19:55:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 19:55:21,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:21,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:21,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-23 19:55:21,789 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash -422827415, now seen corresponding path program 1 times [2022-02-23 19:55:21,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:21,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781167767] [2022-02-23 19:55:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:21,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:21,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:21,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781167767] [2022-02-23 19:55:21,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781167767] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:21,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:21,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:21,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570976736] [2022-02-23 19:55:21,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:21,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:21,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:21,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:21,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:21,809 INFO L87 Difference]: Start difference. First operand 19209 states and 26375 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-02-23 19:55:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:21,945 INFO L93 Difference]: Finished difference Result 32779 states and 45320 transitions. [2022-02-23 19:55:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:21,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 [2022-02-23 19:55:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:21,991 INFO L225 Difference]: With dead ends: 32779 [2022-02-23 19:55:21,991 INFO L226 Difference]: Without dead ends: 32779 [2022-02-23 19:55:21,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:21,992 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:21,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32779 states. [2022-02-23 19:55:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32779 to 28681. [2022-02-23 19:55:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28681 states, 28677 states have (on average 1.3302646720368239) internal successors, (38148), 28677 states have internal predecessors, (38148), 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) [2022-02-23 19:55:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28681 states to 28681 states and 38151 transitions. [2022-02-23 19:55:22,435 INFO L78 Accepts]: Start accepts. Automaton has 28681 states and 38151 transitions. Word has length 33 [2022-02-23 19:55:22,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:22,435 INFO L470 AbstractCegarLoop]: Abstraction has 28681 states and 38151 transitions. [2022-02-23 19:55:22,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-02-23 19:55:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 28681 states and 38151 transitions. [2022-02-23 19:55:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 19:55:22,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:22,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:22,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-23 19:55:22,456 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash -933361592, now seen corresponding path program 1 times [2022-02-23 19:55:22,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:22,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537815904] [2022-02-23 19:55:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:22,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:22,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:22,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:22,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537815904] [2022-02-23 19:55:22,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537815904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:22,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:22,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:22,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731847892] [2022-02-23 19:55:22,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:22,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:22,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:22,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:22,565 INFO L87 Difference]: Start difference. First operand 28681 states and 38151 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-02-23 19:55:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:22,685 INFO L93 Difference]: Finished difference Result 37387 states and 49160 transitions. [2022-02-23 19:55:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:22,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 [2022-02-23 19:55:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:22,726 INFO L225 Difference]: With dead ends: 37387 [2022-02-23 19:55:22,726 INFO L226 Difference]: Without dead ends: 37387 [2022-02-23 19:55:22,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:22,726 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:22,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 137 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-02-23 19:55:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 37385. [2022-02-23 19:55:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37381 states have (on average 1.3149995987266259) internal successors, (49156), 37381 states have internal predecessors, (49156), 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) [2022-02-23 19:55:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 49159 transitions. [2022-02-23 19:55:23,258 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 49159 transitions. Word has length 33 [2022-02-23 19:55:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:23,258 INFO L470 AbstractCegarLoop]: Abstraction has 37385 states and 49159 transitions. [2022-02-23 19:55:23,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-02-23 19:55:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 49159 transitions. [2022-02-23 19:55:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 19:55:23,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:23,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:23,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-23 19:55:23,276 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:23,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash -222714787, now seen corresponding path program 1 times [2022-02-23 19:55:23,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:23,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240450788] [2022-02-23 19:55:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:23,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:23,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:23,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:23,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240450788] [2022-02-23 19:55:23,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240450788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:23,293 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:23,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:23,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239246792] [2022-02-23 19:55:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:23,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:23,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:23,294 INFO L87 Difference]: Start difference. First operand 37385 states and 49159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2022-02-23 19:55:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:23,423 INFO L93 Difference]: Finished difference Result 37899 states and 49160 transitions. [2022-02-23 19:55:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 [2022-02-23 19:55:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:23,467 INFO L225 Difference]: With dead ends: 37899 [2022-02-23 19:55:23,467 INFO L226 Difference]: Without dead ends: 37899 [2022-02-23 19:55:23,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:23,468 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:23,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 116 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37899 states. [2022-02-23 19:55:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37899 to 37897. [2022-02-23 19:55:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37897 states, 37893 states have (on average 1.2972316786741616) internal successors, (49156), 37893 states have internal predecessors, (49156), 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) [2022-02-23 19:55:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37897 states to 37897 states and 49159 transitions. [2022-02-23 19:55:23,969 INFO L78 Accepts]: Start accepts. Automaton has 37897 states and 49159 transitions. Word has length 34 [2022-02-23 19:55:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:23,970 INFO L470 AbstractCegarLoop]: Abstraction has 37897 states and 49159 transitions. [2022-02-23 19:55:23,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2022-02-23 19:55:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 37897 states and 49159 transitions. [2022-02-23 19:55:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 19:55:23,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:23,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:23,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-23 19:55:23,990 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1130594910, now seen corresponding path program 1 times [2022-02-23 19:55:23,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:23,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573960749] [2022-02-23 19:55:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:23,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:24,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:24,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:24,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573960749] [2022-02-23 19:55:24,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573960749] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:24,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:24,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:24,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880481333] [2022-02-23 19:55:24,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:24,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:24,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:24,009 INFO L87 Difference]: Start difference. First operand 37897 states and 49159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2022-02-23 19:55:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:24,204 INFO L93 Difference]: Finished difference Result 73739 states and 92168 transitions. [2022-02-23 19:55:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 [2022-02-23 19:55:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:24,292 INFO L225 Difference]: With dead ends: 73739 [2022-02-23 19:55:24,292 INFO L226 Difference]: Without dead ends: 73739 [2022-02-23 19:55:24,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:24,293 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:24,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 106 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73739 states. [2022-02-23 19:55:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73739 to 73737. [2022-02-23 19:55:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73737 states, 73733 states have (on average 1.2499694844913403) internal successors, (92164), 73733 states have internal predecessors, (92164), 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) [2022-02-23 19:55:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73737 states to 73737 states and 92167 transitions. [2022-02-23 19:55:25,401 INFO L78 Accepts]: Start accepts. Automaton has 73737 states and 92167 transitions. Word has length 34 [2022-02-23 19:55:25,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:25,401 INFO L470 AbstractCegarLoop]: Abstraction has 73737 states and 92167 transitions. [2022-02-23 19:55:25,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2022-02-23 19:55:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 73737 states and 92167 transitions. [2022-02-23 19:55:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 19:55:25,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:25,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:25,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-23 19:55:25,455 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:25,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1641129087, now seen corresponding path program 1 times [2022-02-23 19:55:25,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:25,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487075050] [2022-02-23 19:55:25,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:25,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:25,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:25,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:25,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487075050] [2022-02-23 19:55:25,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487075050] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:25,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:25,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:25,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794962298] [2022-02-23 19:55:25,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:25,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:25,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:25,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:25,478 INFO L87 Difference]: Start difference. First operand 73737 states and 92167 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2022-02-23 19:55:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:25,685 INFO L93 Difference]: Finished difference Result 79883 states and 101384 transitions. [2022-02-23 19:55:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 [2022-02-23 19:55:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:25,900 INFO L225 Difference]: With dead ends: 79883 [2022-02-23 19:55:25,900 INFO L226 Difference]: Without dead ends: 79883 [2022-02-23 19:55:25,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:25,901 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 103 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:25,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 128 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-02-23 19:55:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 73737. [2022-02-23 19:55:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73737 states, 73733 states have (on average 1.2360815374391385) internal successors, (91140), 73733 states have internal predecessors, (91140), 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) [2022-02-23 19:55:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73737 states to 73737 states and 91143 transitions. [2022-02-23 19:55:26,790 INFO L78 Accepts]: Start accepts. Automaton has 73737 states and 91143 transitions. Word has length 34 [2022-02-23 19:55:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:26,790 INFO L470 AbstractCegarLoop]: Abstraction has 73737 states and 91143 transitions. [2022-02-23 19:55:26,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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) [2022-02-23 19:55:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 73737 states and 91143 transitions. [2022-02-23 19:55:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-23 19:55:26,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:26,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:26,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-23 19:55:26,822 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash 688737156, now seen corresponding path program 1 times [2022-02-23 19:55:26,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:26,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977768076] [2022-02-23 19:55:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:26,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:26,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:26,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977768076] [2022-02-23 19:55:26,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977768076] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:26,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:26,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:26,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008290525] [2022-02-23 19:55:26,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:26,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:26,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:26,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:26,844 INFO L87 Difference]: Start difference. First operand 73737 states and 91143 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 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) [2022-02-23 19:55:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:27,276 INFO L93 Difference]: Finished difference Result 121867 states and 149512 transitions. [2022-02-23 19:55:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 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 [2022-02-23 19:55:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:27,407 INFO L225 Difference]: With dead ends: 121867 [2022-02-23 19:55:27,407 INFO L226 Difference]: Without dead ends: 121867 [2022-02-23 19:55:27,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:27,411 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:27,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121867 states. [2022-02-23 19:55:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121867 to 113673. [2022-02-23 19:55:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113673 states, 113669 states have (on average 1.2071892952344088) internal successors, (137220), 113669 states have internal predecessors, (137220), 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) [2022-02-23 19:55:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113673 states to 113673 states and 137223 transitions. [2022-02-23 19:55:28,844 INFO L78 Accepts]: Start accepts. Automaton has 113673 states and 137223 transitions. Word has length 35 [2022-02-23 19:55:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:28,844 INFO L470 AbstractCegarLoop]: Abstraction has 113673 states and 137223 transitions. [2022-02-23 19:55:28,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 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) [2022-02-23 19:55:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 113673 states and 137223 transitions. [2022-02-23 19:55:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-23 19:55:28,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:28,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:28,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-23 19:55:28,921 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash 178202979, now seen corresponding path program 1 times [2022-02-23 19:55:28,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:28,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79805201] [2022-02-23 19:55:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:28,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:28,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:28,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:28,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79805201] [2022-02-23 19:55:28,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79805201] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:28,939 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:28,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:28,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519474174] [2022-02-23 19:55:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:28,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:28,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:28,940 INFO L87 Difference]: Start difference. First operand 113673 states and 137223 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 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) [2022-02-23 19:55:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:29,530 INFO L93 Difference]: Finished difference Result 144395 states and 169992 transitions. [2022-02-23 19:55:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:29,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 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 [2022-02-23 19:55:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:29,677 INFO L225 Difference]: With dead ends: 144395 [2022-02-23 19:55:29,677 INFO L226 Difference]: Without dead ends: 144395 [2022-02-23 19:55:29,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:29,678 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:29,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 141 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144395 states. [2022-02-23 19:55:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144395 to 144393. [2022-02-23 19:55:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144393 states, 144389 states have (on average 1.1772918989673729) internal successors, (169988), 144389 states have internal predecessors, (169988), 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) [2022-02-23 19:55:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144393 states to 144393 states and 169991 transitions. [2022-02-23 19:55:31,630 INFO L78 Accepts]: Start accepts. Automaton has 144393 states and 169991 transitions. Word has length 35 [2022-02-23 19:55:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:31,630 INFO L470 AbstractCegarLoop]: Abstraction has 144393 states and 169991 transitions. [2022-02-23 19:55:31,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 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) [2022-02-23 19:55:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 144393 states and 169991 transitions. [2022-02-23 19:55:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 19:55:31,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:31,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:31,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-23 19:55:31,729 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash -123951206, now seen corresponding path program 1 times [2022-02-23 19:55:31,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:31,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110515094] [2022-02-23 19:55:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:31,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:31,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:31,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:31,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110515094] [2022-02-23 19:55:31,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110515094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:31,753 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:31,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:31,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549155121] [2022-02-23 19:55:31,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:31,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:31,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:31,755 INFO L87 Difference]: Start difference. First operand 144393 states and 169991 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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) [2022-02-23 19:55:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:32,424 INFO L93 Difference]: Finished difference Result 147467 states and 172040 transitions. [2022-02-23 19:55:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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 [2022-02-23 19:55:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:32,602 INFO L225 Difference]: With dead ends: 147467 [2022-02-23 19:55:32,602 INFO L226 Difference]: Without dead ends: 147467 [2022-02-23 19:55:32,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:32,603 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:32,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 110 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-02-23 19:55:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 147465. [2022-02-23 19:55:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147465 states, 147461 states have (on average 1.1666542340008546) internal successors, (172036), 147461 states have internal predecessors, (172036), 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) [2022-02-23 19:55:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147465 states to 147465 states and 172039 transitions. [2022-02-23 19:55:34,189 INFO L78 Accepts]: Start accepts. Automaton has 147465 states and 172039 transitions. Word has length 36 [2022-02-23 19:55:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:34,189 INFO L470 AbstractCegarLoop]: Abstraction has 147465 states and 172039 transitions. [2022-02-23 19:55:34,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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) [2022-02-23 19:55:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 147465 states and 172039 transitions. [2022-02-23 19:55:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 19:55:34,515 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:34,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:34,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-23 19:55:34,515 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1229358491, now seen corresponding path program 1 times [2022-02-23 19:55:34,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:34,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300221891] [2022-02-23 19:55:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:34,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:34,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:34,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300221891] [2022-02-23 19:55:34,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300221891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:34,544 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:34,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:34,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192955336] [2022-02-23 19:55:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:34,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:34,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:34,545 INFO L87 Difference]: Start difference. First operand 147465 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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) [2022-02-23 19:55:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:35,085 INFO L93 Difference]: Finished difference Result 237577 states and 270343 transitions. [2022-02-23 19:55:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:35,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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 [2022-02-23 19:55:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:35,710 INFO L225 Difference]: With dead ends: 237577 [2022-02-23 19:55:35,711 INFO L226 Difference]: Without dead ends: 237577 [2022-02-23 19:55:35,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:35,711 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 134 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:35,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 83 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237577 states. [2022-02-23 19:55:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237577 to 229385. [2022-02-23 19:55:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229385 states, 229381 states have (on average 1.1428496693274508) internal successors, (262148), 229381 states have internal predecessors, (262148), 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) [2022-02-23 19:55:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229385 states to 229385 states and 262151 transitions. [2022-02-23 19:55:38,481 INFO L78 Accepts]: Start accepts. Automaton has 229385 states and 262151 transitions. Word has length 36 [2022-02-23 19:55:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:38,481 INFO L470 AbstractCegarLoop]: Abstraction has 229385 states and 262151 transitions. [2022-02-23 19:55:38,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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) [2022-02-23 19:55:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 229385 states and 262151 transitions. [2022-02-23 19:55:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 19:55:38,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:38,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:38,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-23 19:55:38,658 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:38,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash 718824314, now seen corresponding path program 1 times [2022-02-23 19:55:38,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:38,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040661992] [2022-02-23 19:55:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:38,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:38,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:38,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:38,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040661992] [2022-02-23 19:55:38,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040661992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:38,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:38,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:38,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752766486] [2022-02-23 19:55:38,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:38,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:38,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:38,677 INFO L87 Difference]: Start difference. First operand 229385 states and 262151 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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) [2022-02-23 19:55:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:39,736 INFO L93 Difference]: Finished difference Result 286727 states and 315398 transitions. [2022-02-23 19:55:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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 [2022-02-23 19:55:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:39,736 INFO L225 Difference]: With dead ends: 286727 [2022-02-23 19:55:39,736 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 19:55:39,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:55:39,737 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:39,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 142 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 19:55:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 19:55:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 19:55:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 19:55:39,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-02-23 19:55:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:39,738 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 19:55:39,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 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) [2022-02-23 19:55:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 19:55:39,738 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 19:55:39,740 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 19:55:39,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-23 19:55:39,751 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:55:39,752 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 19:55:39,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:55:39 BasicIcfg [2022-02-23 19:55:39,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 19:55:39,755 INFO L158 Benchmark]: Toolchain (without parser) took 24455.76ms. Allocated memory was 176.2MB in the beginning and 7.6GB in the end (delta: 7.4GB). Free memory was 126.3MB in the beginning and 4.6GB in the end (delta: -4.5GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2022-02-23 19:55:39,755 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 19:55:39,755 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.25ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 126.1MB in the beginning and 187.9MB in the end (delta: -61.8MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-02-23 19:55:39,756 INFO L158 Benchmark]: Boogie Preprocessor took 23.80ms. Allocated memory is still 211.8MB. Free memory was 187.9MB in the beginning and 185.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 19:55:39,756 INFO L158 Benchmark]: RCFGBuilder took 275.79ms. Allocated memory is still 211.8MB. Free memory was 185.8MB in the beginning and 171.6MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-23 19:55:39,756 INFO L158 Benchmark]: IcfgTransformer took 36.07ms. Allocated memory is still 211.8MB. Free memory was 171.6MB in the beginning and 169.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 19:55:39,756 INFO L158 Benchmark]: TraceAbstraction took 23910.41ms. Allocated memory was 211.8MB in the beginning and 7.6GB in the end (delta: 7.4GB). Free memory was 169.5MB in the beginning and 4.6GB in the end (delta: -4.4GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2022-02-23 19:55:39,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.25ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 126.1MB in the beginning and 187.9MB in the end (delta: -61.8MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.80ms. Allocated memory is still 211.8MB. Free memory was 187.9MB in the beginning and 185.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 275.79ms. Allocated memory is still 211.8MB. Free memory was 185.8MB in the beginning and 171.6MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 36.07ms. Allocated memory is still 211.8MB. Free memory was 171.6MB in the beginning and 169.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 23910.41ms. Allocated memory was 211.8MB in the beginning and 7.6GB in the end (delta: 7.4GB). Free memory was 169.5MB in the beginning and 4.6GB in the end (delta: -4.4GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 205]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.9s, OverallIterations: 36, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.9s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5938 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5938 mSDsluCounter, 4200 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 254 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2762 IncrementalHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 3946 mSDtfsCounter, 2762 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 252 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=229385occurred in iteration=35, InterpolantAutomatonStates: 144, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.0s AutomataMinimizationTime, 36 MinimizatonAttempts, 32806 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 1084 NumberOfCodeBlocks, 1084 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1048 ConstructedInterpolants, 0 QuantifiedInterpolants, 2356 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 36 InterpolantComputations, 36 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 19:55:39,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...