/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 04:13:46,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 04:13:46,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 04:13:46,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 04:13:46,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 04:13:46,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 04:13:46,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 04:13:46,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 04:13:46,564 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 04:13:46,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 04:13:46,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 04:13:46,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 04:13:46,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 04:13:46,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 04:13:46,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 04:13:46,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 04:13:46,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 04:13:46,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 04:13:46,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 04:13:46,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 04:13:46,567 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 04:13:46,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 04:13:46,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 04:13:46,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 04:13:46,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 04:13:46,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 04:13:46,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:13:46,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 04:13:46,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 04:13:46,569 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 04:13:46,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 04:13:46,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 04:13:46,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 04:13:46,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 04:13:46,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 04:13:46,764 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 04:13:46,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2022-04-05 04:13:46,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30306a9fd/b4c50a20b6ba4d689f05ec3d9919a1a8/FLAG6df591bcf [2022-04-05 04:13:47,214 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 04:13:47,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2022-04-05 04:13:47,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30306a9fd/b4c50a20b6ba4d689f05ec3d9919a1a8/FLAG6df591bcf [2022-04-05 04:13:47,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30306a9fd/b4c50a20b6ba4d689f05ec3d9919a1a8 [2022-04-05 04:13:47,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 04:13:47,230 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 04:13:47,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 04:13:47,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 04:13:47,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 04:13:47,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c01db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47, skipping insertion in model container [2022-04-05 04:13:47,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 04:13:47,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 04:13:47,387 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_10.c[3901,3914] [2022-04-05 04:13:47,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:13:47,395 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 04:13:47,409 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_10.c[3901,3914] [2022-04-05 04:13:47,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:13:47,419 INFO L208 MainTranslator]: Completed translation [2022-04-05 04:13:47,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47 WrapperNode [2022-04-05 04:13:47,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 04:13:47,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 04:13:47,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 04:13:47,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 04:13:47,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 04:13:47,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 04:13:47,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 04:13:47,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 04:13:47,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:13:47,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:13:47,522 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) [2022-04-05 04:13:47,524 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 [2022-04-05 04:13:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 04:13:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 04:13:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 04:13:47,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 04:13:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 04:13:47,614 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 04:13:47,615 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 04:13:47,754 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 04:13:47,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 04:13:47,760 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 04:13:47,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:13:47 BoogieIcfgContainer [2022-04-05 04:13:47,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 04:13:47,762 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 04:13:47,762 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 04:13:47,763 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 04:13:47,765 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:13:47" (1/1) ... [2022-04-05 04:13:47,767 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 04:13:47,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:13:47 BasicIcfg [2022-04-05 04:13:47,806 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 04:13:47,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 04:13:47,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 04:13:47,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 04:13:47,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 04:13:47" (1/4) ... [2022-04-05 04:13:47,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d5d17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:13:47, skipping insertion in model container [2022-04-05 04:13:47,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:47" (2/4) ... [2022-04-05 04:13:47,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d5d17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:13:47, skipping insertion in model container [2022-04-05 04:13:47,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:13:47" (3/4) ... [2022-04-05 04:13:47,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d5d17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:13:47, skipping insertion in model container [2022-04-05 04:13:47,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:13:47" (4/4) ... [2022-04-05 04:13:47,821 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.cJordan [2022-04-05 04:13:47,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 04:13:47,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 04:13:47,879 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 04:13:47,887 INFO L340 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 [2022-04-05 04:13:47,888 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 04:13:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 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) [2022-04-05 04:13:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 04:13:47,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:47,925 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:13:47,925 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:47,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:47,938 INFO L85 PathProgramCache]: Analyzing trace with hash -666508425, now seen corresponding path program 1 times [2022-04-05 04:13:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:47,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28299615] [2022-04-05 04:13:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:47,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:48,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:48,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:48,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28299615] [2022-04-05 04:13:48,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28299615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:48,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:48,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241986513] [2022-04-05 04:13:48,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:48,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:48,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:48,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:48,210 INFO L87 Difference]: Start difference. First operand has 45 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 40 states have internal predecessors, (73), 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 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:48,358 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2022-04-05 04:13:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-05 04:13:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:48,374 INFO L225 Difference]: With dead ends: 81 [2022-04-05 04:13:48,375 INFO L226 Difference]: Without dead ends: 73 [2022-04-05 04:13:48,376 INFO L912 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 [2022-04-05 04:13:48,383 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 174 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:48,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 89 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-05 04:13:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2022-04-05 04:13:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 90 transitions. [2022-04-05 04:13:48,413 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 90 transitions. Word has length 21 [2022-04-05 04:13:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:48,413 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 90 transitions. [2022-04-05 04:13:48,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 90 transitions. [2022-04-05 04:13:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 04:13:48,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:48,414 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:13:48,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 04:13:48,415 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:48,415 INFO L85 PathProgramCache]: Analyzing trace with hash -959911432, now seen corresponding path program 1 times [2022-04-05 04:13:48,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:48,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459433421] [2022-04-05 04:13:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:48,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:48,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:48,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459433421] [2022-04-05 04:13:48,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459433421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:48,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:48,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:48,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478451692] [2022-04-05 04:13:48,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:48,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:48,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:48,490 INFO L87 Difference]: Start difference. First operand 51 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:48,579 INFO L93 Difference]: Finished difference Result 73 states and 127 transitions. [2022-04-05 04:13:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:48,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-05 04:13:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:48,581 INFO L225 Difference]: With dead ends: 73 [2022-04-05 04:13:48,581 INFO L226 Difference]: Without dead ends: 73 [2022-04-05 04:13:48,582 INFO L912 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 [2022-04-05 04:13:48,583 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:48,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 95 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-05 04:13:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-04-05 04:13:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.835820895522388) internal successors, (123), 67 states have internal predecessors, (123), 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) [2022-04-05 04:13:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 126 transitions. [2022-04-05 04:13:48,594 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 126 transitions. Word has length 21 [2022-04-05 04:13:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:48,594 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 126 transitions. [2022-04-05 04:13:48,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2022-04-05 04:13:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 04:13:48,595 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:48,595 INFO L499 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] [2022-04-05 04:13:48,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 04:13:48,596 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash 813107322, now seen corresponding path program 1 times [2022-04-05 04:13:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:48,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461683366] [2022-04-05 04:13:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:48,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:48,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:48,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:48,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461683366] [2022-04-05 04:13:48,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461683366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:48,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:48,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:48,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630289615] [2022-04-05 04:13:48,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:48,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:48,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:48,717 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:48,803 INFO L93 Difference]: Finished difference Result 76 states and 129 transitions. [2022-04-05 04:13:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-05 04:13:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:48,808 INFO L225 Difference]: With dead ends: 76 [2022-04-05 04:13:48,808 INFO L226 Difference]: Without dead ends: 76 [2022-04-05 04:13:48,809 INFO L912 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 [2022-04-05 04:13:48,813 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 131 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:48,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 113 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-05 04:13:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-04-05 04:13:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 70 states have internal predecessors, (125), 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) [2022-04-05 04:13:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2022-04-05 04:13:48,825 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 22 [2022-04-05 04:13:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:48,826 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2022-04-05 04:13:48,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2022-04-05 04:13:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 04:13:48,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:48,827 INFO L499 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] [2022-04-05 04:13:48,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 04:13:48,827 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:48,827 INFO L85 PathProgramCache]: Analyzing trace with hash 307548697, now seen corresponding path program 1 times [2022-04-05 04:13:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384098264] [2022-04-05 04:13:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:48,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:48,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:48,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:48,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384098264] [2022-04-05 04:13:48,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384098264] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:48,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:48,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137994450] [2022-04-05 04:13:48,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:48,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:48,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:48,865 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:48,955 INFO L93 Difference]: Finished difference Result 135 states and 238 transitions. [2022-04-05 04:13:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-05 04:13:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:48,957 INFO L225 Difference]: With dead ends: 135 [2022-04-05 04:13:48,957 INFO L226 Difference]: Without dead ends: 135 [2022-04-05 04:13:48,957 INFO L912 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 [2022-04-05 04:13:48,960 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:48,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-05 04:13:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2022-04-05 04:13:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.7849462365591398) internal successors, (166), 93 states have internal predecessors, (166), 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) [2022-04-05 04:13:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 169 transitions. [2022-04-05 04:13:48,965 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 169 transitions. Word has length 22 [2022-04-05 04:13:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:48,965 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 169 transitions. [2022-04-05 04:13:48,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 169 transitions. [2022-04-05 04:13:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 04:13:48,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:48,966 INFO L499 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] [2022-04-05 04:13:48,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 04:13:48,967 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash 14145690, now seen corresponding path program 1 times [2022-04-05 04:13:48,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:48,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342757806] [2022-04-05 04:13:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:48,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342757806] [2022-04-05 04:13:49,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342757806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91797366] [2022-04-05 04:13:49,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,045 INFO L87 Difference]: Start difference. First operand 97 states and 169 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:49,111 INFO L93 Difference]: Finished difference Result 137 states and 236 transitions. [2022-04-05 04:13:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-05 04:13:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:49,112 INFO L225 Difference]: With dead ends: 137 [2022-04-05 04:13:49,113 INFO L226 Difference]: Without dead ends: 137 [2022-04-05 04:13:49,113 INFO L912 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 [2022-04-05 04:13:49,115 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:49,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 97 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-05 04:13:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-04-05 04:13:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.7709923664122138) internal successors, (232), 131 states have internal predecessors, (232), 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) [2022-04-05 04:13:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 235 transitions. [2022-04-05 04:13:49,139 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 235 transitions. Word has length 22 [2022-04-05 04:13:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:49,140 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 235 transitions. [2022-04-05 04:13:49,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 235 transitions. [2022-04-05 04:13:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:13:49,141 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,141 INFO L499 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] [2022-04-05 04:13:49,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-05 04:13:49,142 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash 944107156, now seen corresponding path program 1 times [2022-04-05 04:13:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516447801] [2022-04-05 04:13:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516447801] [2022-04-05 04:13:49,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516447801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340097772] [2022-04-05 04:13:49,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,193 INFO L87 Difference]: Start difference. First operand 135 states and 235 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:49,250 INFO L93 Difference]: Finished difference Result 139 states and 236 transitions. [2022-04-05 04:13:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:49,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-05 04:13:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:49,252 INFO L225 Difference]: With dead ends: 139 [2022-04-05 04:13:49,252 INFO L226 Difference]: Without dead ends: 139 [2022-04-05 04:13:49,253 INFO L912 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 [2022-04-05 04:13:49,253 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:49,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 110 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-05 04:13:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-04-05 04:13:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 133 states have (on average 1.744360902255639) internal successors, (232), 133 states have internal predecessors, (232), 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) [2022-04-05 04:13:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 235 transitions. [2022-04-05 04:13:49,263 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 235 transitions. Word has length 23 [2022-04-05 04:13:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:49,263 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 235 transitions. [2022-04-05 04:13:49,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 235 transitions. [2022-04-05 04:13:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:13:49,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,264 INFO L499 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] [2022-04-05 04:13:49,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-05 04:13:49,264 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,265 INFO L85 PathProgramCache]: Analyzing trace with hash 438548531, now seen corresponding path program 1 times [2022-04-05 04:13:49,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766544583] [2022-04-05 04:13:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766544583] [2022-04-05 04:13:49,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766544583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253569067] [2022-04-05 04:13:49,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,307 INFO L87 Difference]: Start difference. First operand 137 states and 235 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:49,358 INFO L93 Difference]: Finished difference Result 251 states and 436 transitions. [2022-04-05 04:13:49,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:49,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-05 04:13:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:49,360 INFO L225 Difference]: With dead ends: 251 [2022-04-05 04:13:49,360 INFO L226 Difference]: Without dead ends: 251 [2022-04-05 04:13:49,360 INFO L912 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 [2022-04-05 04:13:49,361 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:49,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-05 04:13:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 185. [2022-04-05 04:13:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.723756906077348) internal successors, (312), 181 states have internal predecessors, (312), 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) [2022-04-05 04:13:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 315 transitions. [2022-04-05 04:13:49,371 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 315 transitions. Word has length 23 [2022-04-05 04:13:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:49,372 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 315 transitions. [2022-04-05 04:13:49,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 315 transitions. [2022-04-05 04:13:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:13:49,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,378 INFO L499 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] [2022-04-05 04:13:49,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-05 04:13:49,378 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash 145145524, now seen corresponding path program 1 times [2022-04-05 04:13:49,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641484009] [2022-04-05 04:13:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641484009] [2022-04-05 04:13:49,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641484009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991223915] [2022-04-05 04:13:49,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,435 INFO L87 Difference]: Start difference. First operand 185 states and 315 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:49,491 INFO L93 Difference]: Finished difference Result 259 states and 436 transitions. [2022-04-05 04:13:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:49,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-05 04:13:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:49,497 INFO L225 Difference]: With dead ends: 259 [2022-04-05 04:13:49,497 INFO L226 Difference]: Without dead ends: 259 [2022-04-05 04:13:49,498 INFO L912 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 [2022-04-05 04:13:49,501 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:49,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-05 04:13:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2022-04-05 04:13:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.7075098814229248) internal successors, (432), 253 states have internal predecessors, (432), 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) [2022-04-05 04:13:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 435 transitions. [2022-04-05 04:13:49,507 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 435 transitions. Word has length 23 [2022-04-05 04:13:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:49,507 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 435 transitions. [2022-04-05 04:13:49,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 435 transitions. [2022-04-05 04:13:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 04:13:49,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,523 INFO L499 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] [2022-04-05 04:13:49,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-05 04:13:49,524 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash 710134838, now seen corresponding path program 1 times [2022-04-05 04:13:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044152260] [2022-04-05 04:13:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044152260] [2022-04-05 04:13:49,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044152260] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524872664] [2022-04-05 04:13:49,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,566 INFO L87 Difference]: Start difference. First operand 257 states and 435 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) [2022-04-05 04:13:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:49,614 INFO L93 Difference]: Finished difference Result 263 states and 436 transitions. [2022-04-05 04:13:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:49,614 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 [2022-04-05 04:13:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:49,615 INFO L225 Difference]: With dead ends: 263 [2022-04-05 04:13:49,615 INFO L226 Difference]: Without dead ends: 263 [2022-04-05 04:13:49,615 INFO L912 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 [2022-04-05 04:13:49,617 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:49,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 107 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-05 04:13:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2022-04-05 04:13:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 257 states have (on average 1.6809338521400778) internal successors, (432), 257 states have internal predecessors, (432), 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) [2022-04-05 04:13:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 435 transitions. [2022-04-05 04:13:49,623 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 435 transitions. Word has length 24 [2022-04-05 04:13:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:49,623 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 435 transitions. [2022-04-05 04:13:49,623 INFO L479 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) [2022-04-05 04:13:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 435 transitions. [2022-04-05 04:13:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 04:13:49,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,624 INFO L499 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] [2022-04-05 04:13:49,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-05 04:13:49,624 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash 204576213, now seen corresponding path program 1 times [2022-04-05 04:13:49,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916228848] [2022-04-05 04:13:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916228848] [2022-04-05 04:13:49,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916228848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828985102] [2022-04-05 04:13:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,679 INFO L87 Difference]: Start difference. First operand 261 states and 435 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) [2022-04-05 04:13:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:49,725 INFO L93 Difference]: Finished difference Result 475 states and 800 transitions. [2022-04-05 04:13:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:49,726 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 [2022-04-05 04:13:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:49,728 INFO L225 Difference]: With dead ends: 475 [2022-04-05 04:13:49,728 INFO L226 Difference]: Without dead ends: 475 [2022-04-05 04:13:49,728 INFO L912 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 [2022-04-05 04:13:49,729 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:49,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 75 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-04-05 04:13:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 361. [2022-04-05 04:13:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.6470588235294117) internal successors, (588), 357 states have internal predecessors, (588), 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) [2022-04-05 04:13:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 591 transitions. [2022-04-05 04:13:49,738 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 591 transitions. Word has length 24 [2022-04-05 04:13:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:49,743 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 591 transitions. [2022-04-05 04:13:49,743 INFO L479 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) [2022-04-05 04:13:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 591 transitions. [2022-04-05 04:13:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 04:13:49,744 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,744 INFO L499 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] [2022-04-05 04:13:49,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-05 04:13:49,744 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,745 INFO L85 PathProgramCache]: Analyzing trace with hash -88826794, now seen corresponding path program 1 times [2022-04-05 04:13:49,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005067647] [2022-04-05 04:13:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005067647] [2022-04-05 04:13:49,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005067647] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86920663] [2022-04-05 04:13:49,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,788 INFO L87 Difference]: Start difference. First operand 361 states and 591 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) [2022-04-05 04:13:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:49,844 INFO L93 Difference]: Finished difference Result 499 states and 808 transitions. [2022-04-05 04:13:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:49,845 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 [2022-04-05 04:13:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:49,847 INFO L225 Difference]: With dead ends: 499 [2022-04-05 04:13:49,847 INFO L226 Difference]: Without dead ends: 499 [2022-04-05 04:13:49,847 INFO L912 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 [2022-04-05 04:13:49,848 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:49,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 101 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-04-05 04:13:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2022-04-05 04:13:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 493 states have (on average 1.6308316430020284) internal successors, (804), 493 states have internal predecessors, (804), 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) [2022-04-05 04:13:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 807 transitions. [2022-04-05 04:13:49,859 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 807 transitions. Word has length 24 [2022-04-05 04:13:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:49,859 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 807 transitions. [2022-04-05 04:13:49,859 INFO L479 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) [2022-04-05 04:13:49,859 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 807 transitions. [2022-04-05 04:13:49,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:13:49,860 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,861 INFO L499 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] [2022-04-05 04:13:49,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-05 04:13:49,861 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2046927696, now seen corresponding path program 1 times [2022-04-05 04:13:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670148636] [2022-04-05 04:13:49,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670148636] [2022-04-05 04:13:49,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670148636] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336415277] [2022-04-05 04:13:49,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,896 INFO L87 Difference]: Start difference. First operand 497 states and 807 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) [2022-04-05 04:13:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:49,939 INFO L93 Difference]: Finished difference Result 507 states and 808 transitions. [2022-04-05 04:13:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:49,939 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 [2022-04-05 04:13:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:49,941 INFO L225 Difference]: With dead ends: 507 [2022-04-05 04:13:49,941 INFO L226 Difference]: Without dead ends: 507 [2022-04-05 04:13:49,942 INFO L912 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 [2022-04-05 04:13:49,942 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 128 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:49,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-04-05 04:13:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2022-04-05 04:13:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.6047904191616766) internal successors, (804), 501 states have internal predecessors, (804), 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) [2022-04-05 04:13:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 807 transitions. [2022-04-05 04:13:49,950 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 807 transitions. Word has length 25 [2022-04-05 04:13:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:49,950 INFO L478 AbstractCegarLoop]: Abstraction has 505 states and 807 transitions. [2022-04-05 04:13:49,950 INFO L479 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) [2022-04-05 04:13:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 807 transitions. [2022-04-05 04:13:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:13:49,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,951 INFO L499 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] [2022-04-05 04:13:49,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-05 04:13:49,951 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1541369071, now seen corresponding path program 1 times [2022-04-05 04:13:49,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777185445] [2022-04-05 04:13:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:49,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777185445] [2022-04-05 04:13:49,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777185445] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722427052] [2022-04-05 04:13:49,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,981 INFO L87 Difference]: Start difference. First operand 505 states and 807 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) [2022-04-05 04:13:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,027 INFO L93 Difference]: Finished difference Result 907 states and 1464 transitions. [2022-04-05 04:13:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,027 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 [2022-04-05 04:13:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,030 INFO L225 Difference]: With dead ends: 907 [2022-04-05 04:13:50,030 INFO L226 Difference]: Without dead ends: 907 [2022-04-05 04:13:50,030 INFO L912 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 [2022-04-05 04:13:50,031 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-04-05 04:13:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 713. [2022-04-05 04:13:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 709 states have (on average 1.5627644569816643) internal successors, (1108), 709 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) [2022-04-05 04:13:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1111 transitions. [2022-04-05 04:13:50,042 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1111 transitions. Word has length 25 [2022-04-05 04:13:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,043 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 1111 transitions. [2022-04-05 04:13:50,043 INFO L479 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) [2022-04-05 04:13:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1111 transitions. [2022-04-05 04:13:50,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:13:50,044 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,044 INFO L499 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] [2022-04-05 04:13:50,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-05 04:13:50,044 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1247966064, now seen corresponding path program 1 times [2022-04-05 04:13:50,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324324924] [2022-04-05 04:13:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324324924] [2022-04-05 04:13:50,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324324924] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130851435] [2022-04-05 04:13:50,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,091 INFO L87 Difference]: Start difference. First operand 713 states and 1111 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) [2022-04-05 04:13:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,141 INFO L93 Difference]: Finished difference Result 971 states and 1496 transitions. [2022-04-05 04:13:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,142 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 [2022-04-05 04:13:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,144 INFO L225 Difference]: With dead ends: 971 [2022-04-05 04:13:50,144 INFO L226 Difference]: Without dead ends: 971 [2022-04-05 04:13:50,145 INFO L912 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 [2022-04-05 04:13:50,145 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 103 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-04-05 04:13:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2022-04-05 04:13:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.5461139896373057) internal successors, (1492), 965 states have internal predecessors, (1492), 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) [2022-04-05 04:13:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1495 transitions. [2022-04-05 04:13:50,161 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1495 transitions. Word has length 25 [2022-04-05 04:13:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,161 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1495 transitions. [2022-04-05 04:13:50,161 INFO L479 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) [2022-04-05 04:13:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1495 transitions. [2022-04-05 04:13:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 04:13:50,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,162 INFO L499 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] [2022-04-05 04:13:50,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-05 04:13:50,162 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash 537833458, now seen corresponding path program 1 times [2022-04-05 04:13:50,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778619751] [2022-04-05 04:13:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778619751] [2022-04-05 04:13:50,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778619751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942290911] [2022-04-05 04:13:50,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,188 INFO L87 Difference]: Start difference. First operand 969 states and 1495 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) [2022-04-05 04:13:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,237 INFO L93 Difference]: Finished difference Result 987 states and 1496 transitions. [2022-04-05 04:13:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,238 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 [2022-04-05 04:13:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,240 INFO L225 Difference]: With dead ends: 987 [2022-04-05 04:13:50,240 INFO L226 Difference]: Without dead ends: 987 [2022-04-05 04:13:50,241 INFO L912 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 [2022-04-05 04:13:50,242 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 101 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-04-05 04:13:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 985. [2022-04-05 04:13:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 981 states have (on average 1.5208970438328238) internal successors, (1492), 981 states have internal predecessors, (1492), 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) [2022-04-05 04:13:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1495 transitions. [2022-04-05 04:13:50,257 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1495 transitions. Word has length 26 [2022-04-05 04:13:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,258 INFO L478 AbstractCegarLoop]: Abstraction has 985 states and 1495 transitions. [2022-04-05 04:13:50,258 INFO L479 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) [2022-04-05 04:13:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1495 transitions. [2022-04-05 04:13:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 04:13:50,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,259 INFO L499 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] [2022-04-05 04:13:50,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-05 04:13:50,259 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash 32274833, now seen corresponding path program 1 times [2022-04-05 04:13:50,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003632392] [2022-04-05 04:13:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003632392] [2022-04-05 04:13:50,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003632392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184385677] [2022-04-05 04:13:50,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,296 INFO L87 Difference]: Start difference. First operand 985 states and 1495 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) [2022-04-05 04:13:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,347 INFO L93 Difference]: Finished difference Result 1739 states and 2664 transitions. [2022-04-05 04:13:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,347 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 [2022-04-05 04:13:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,352 INFO L225 Difference]: With dead ends: 1739 [2022-04-05 04:13:50,352 INFO L226 Difference]: Without dead ends: 1739 [2022-04-05 04:13:50,352 INFO L912 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 [2022-04-05 04:13:50,353 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 73 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-04-05 04:13:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1417. [2022-04-05 04:13:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1413 states have (on average 1.4748761500353857) internal successors, (2084), 1413 states have internal predecessors, (2084), 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) [2022-04-05 04:13:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2087 transitions. [2022-04-05 04:13:50,374 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2087 transitions. Word has length 26 [2022-04-05 04:13:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,374 INFO L478 AbstractCegarLoop]: Abstraction has 1417 states and 2087 transitions. [2022-04-05 04:13:50,375 INFO L479 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) [2022-04-05 04:13:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2087 transitions. [2022-04-05 04:13:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 04:13:50,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,376 INFO L499 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] [2022-04-05 04:13:50,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-05 04:13:50,376 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash -261128174, now seen corresponding path program 1 times [2022-04-05 04:13:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084293778] [2022-04-05 04:13:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084293778] [2022-04-05 04:13:50,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084293778] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102371408] [2022-04-05 04:13:50,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,397 INFO L87 Difference]: Start difference. First operand 1417 states and 2087 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) [2022-04-05 04:13:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,451 INFO L93 Difference]: Finished difference Result 1899 states and 2760 transitions. [2022-04-05 04:13:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,451 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 [2022-04-05 04:13:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,455 INFO L225 Difference]: With dead ends: 1899 [2022-04-05 04:13:50,456 INFO L226 Difference]: Without dead ends: 1899 [2022-04-05 04:13:50,456 INFO L912 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 [2022-04-05 04:13:50,456 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 105 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-04-05 04:13:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1897. [2022-04-05 04:13:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1893 states have (on average 1.4558901215002642) internal successors, (2756), 1893 states have internal predecessors, (2756), 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) [2022-04-05 04:13:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2759 transitions. [2022-04-05 04:13:50,486 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2759 transitions. Word has length 26 [2022-04-05 04:13:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,487 INFO L478 AbstractCegarLoop]: Abstraction has 1897 states and 2759 transitions. [2022-04-05 04:13:50,487 INFO L479 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) [2022-04-05 04:13:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2759 transitions. [2022-04-05 04:13:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:13:50,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,489 INFO L499 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] [2022-04-05 04:13:50,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-05 04:13:50,489 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1000552460, now seen corresponding path program 1 times [2022-04-05 04:13:50,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510431079] [2022-04-05 04:13:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510431079] [2022-04-05 04:13:50,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510431079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856975473] [2022-04-05 04:13:50,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,514 INFO L87 Difference]: Start difference. First operand 1897 states and 2759 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) [2022-04-05 04:13:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,572 INFO L93 Difference]: Finished difference Result 1931 states and 2760 transitions. [2022-04-05 04:13:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,573 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 [2022-04-05 04:13:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,577 INFO L225 Difference]: With dead ends: 1931 [2022-04-05 04:13:50,577 INFO L226 Difference]: Without dead ends: 1931 [2022-04-05 04:13:50,578 INFO L912 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 [2022-04-05 04:13:50,578 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-04-05 04:13:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1929. [2022-04-05 04:13:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.4316883116883117) internal successors, (2756), 1925 states have internal predecessors, (2756), 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) [2022-04-05 04:13:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2759 transitions. [2022-04-05 04:13:50,606 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2759 transitions. Word has length 27 [2022-04-05 04:13:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,606 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 2759 transitions. [2022-04-05 04:13:50,606 INFO L479 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) [2022-04-05 04:13:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2759 transitions. [2022-04-05 04:13:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:13:50,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,608 INFO L499 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] [2022-04-05 04:13:50,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-05 04:13:50,608 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,609 INFO L85 PathProgramCache]: Analyzing trace with hash 494993835, now seen corresponding path program 1 times [2022-04-05 04:13:50,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156090406] [2022-04-05 04:13:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156090406] [2022-04-05 04:13:50,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156090406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858798204] [2022-04-05 04:13:50,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,629 INFO L87 Difference]: Start difference. First operand 1929 states and 2759 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) [2022-04-05 04:13:50,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,683 INFO L93 Difference]: Finished difference Result 3339 states and 4808 transitions. [2022-04-05 04:13:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,683 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 [2022-04-05 04:13:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,692 INFO L225 Difference]: With dead ends: 3339 [2022-04-05 04:13:50,692 INFO L226 Difference]: Without dead ends: 3339 [2022-04-05 04:13:50,692 INFO L912 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 [2022-04-05 04:13:50,692 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 126 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 72 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-04-05 04:13:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2825. [2022-04-05 04:13:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2821 states have (on average 1.3853243530662886) internal successors, (3908), 2821 states have internal predecessors, (3908), 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) [2022-04-05 04:13:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3911 transitions. [2022-04-05 04:13:50,737 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3911 transitions. Word has length 27 [2022-04-05 04:13:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,737 INFO L478 AbstractCegarLoop]: Abstraction has 2825 states and 3911 transitions. [2022-04-05 04:13:50,737 INFO L479 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) [2022-04-05 04:13:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3911 transitions. [2022-04-05 04:13:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:13:50,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,740 INFO L499 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] [2022-04-05 04:13:50,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-05 04:13:50,740 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,741 INFO L85 PathProgramCache]: Analyzing trace with hash 201590828, now seen corresponding path program 1 times [2022-04-05 04:13:50,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977205456] [2022-04-05 04:13:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977205456] [2022-04-05 04:13:50,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977205456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806467541] [2022-04-05 04:13:50,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,762 INFO L87 Difference]: Start difference. First operand 2825 states and 3911 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) [2022-04-05 04:13:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,819 INFO L93 Difference]: Finished difference Result 3723 states and 5064 transitions. [2022-04-05 04:13:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,819 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 [2022-04-05 04:13:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,828 INFO L225 Difference]: With dead ends: 3723 [2022-04-05 04:13:50,828 INFO L226 Difference]: Without dead ends: 3723 [2022-04-05 04:13:50,828 INFO L912 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 [2022-04-05 04:13:50,829 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 107 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-04-05 04:13:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3721. [2022-04-05 04:13:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3717 states have (on average 1.3613128867366155) internal successors, (5060), 3717 states have internal predecessors, (5060), 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) [2022-04-05 04:13:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5063 transitions. [2022-04-05 04:13:50,877 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5063 transitions. Word has length 27 [2022-04-05 04:13:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,877 INFO L478 AbstractCegarLoop]: Abstraction has 3721 states and 5063 transitions. [2022-04-05 04:13:50,878 INFO L479 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) [2022-04-05 04:13:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5063 transitions. [2022-04-05 04:13:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:13:50,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,880 INFO L499 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] [2022-04-05 04:13:50,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-05 04:13:50,881 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1835027538, now seen corresponding path program 1 times [2022-04-05 04:13:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64415522] [2022-04-05 04:13:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64415522] [2022-04-05 04:13:50,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64415522] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473669101] [2022-04-05 04:13:50,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,899 INFO L87 Difference]: Start difference. First operand 3721 states and 5063 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) [2022-04-05 04:13:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,951 INFO L93 Difference]: Finished difference Result 3787 states and 5064 transitions. [2022-04-05 04:13:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,952 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 [2022-04-05 04:13:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,961 INFO L225 Difference]: With dead ends: 3787 [2022-04-05 04:13:50,961 INFO L226 Difference]: Without dead ends: 3787 [2022-04-05 04:13:50,961 INFO L912 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 [2022-04-05 04:13:50,961 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 125 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 95 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2022-04-05 04:13:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2022-04-05 04:13:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3781 states have (on average 1.3382702988627346) internal successors, (5060), 3781 states have internal predecessors, (5060), 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) [2022-04-05 04:13:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5063 transitions. [2022-04-05 04:13:51,010 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5063 transitions. Word has length 28 [2022-04-05 04:13:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,010 INFO L478 AbstractCegarLoop]: Abstraction has 3785 states and 5063 transitions. [2022-04-05 04:13:51,011 INFO L479 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) [2022-04-05 04:13:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5063 transitions. [2022-04-05 04:13:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:13:51,013 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,013 INFO L499 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] [2022-04-05 04:13:51,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-05 04:13:51,014 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1954381133, now seen corresponding path program 1 times [2022-04-05 04:13:51,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390618866] [2022-04-05 04:13:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390618866] [2022-04-05 04:13:51,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390618866] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180939824] [2022-04-05 04:13:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,058 INFO L87 Difference]: Start difference. First operand 3785 states and 5063 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) [2022-04-05 04:13:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,119 INFO L93 Difference]: Finished difference Result 6411 states and 8584 transitions. [2022-04-05 04:13:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,120 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 [2022-04-05 04:13:51,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,136 INFO L225 Difference]: With dead ends: 6411 [2022-04-05 04:13:51,136 INFO L226 Difference]: Without dead ends: 6411 [2022-04-05 04:13:51,137 INFO L912 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 [2022-04-05 04:13:51,137 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 71 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2022-04-05 04:13:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5641. [2022-04-05 04:13:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.2950150789427) internal successors, (7300), 5637 states have internal predecessors, (7300), 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) [2022-04-05 04:13:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 7303 transitions. [2022-04-05 04:13:51,210 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 7303 transitions. Word has length 28 [2022-04-05 04:13:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,211 INFO L478 AbstractCegarLoop]: Abstraction has 5641 states and 7303 transitions. [2022-04-05 04:13:51,211 INFO L479 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) [2022-04-05 04:13:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 7303 transitions. [2022-04-05 04:13:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:13:51,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,216 INFO L499 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] [2022-04-05 04:13:51,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-05 04:13:51,216 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1660978126, now seen corresponding path program 1 times [2022-04-05 04:13:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944315314] [2022-04-05 04:13:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944315314] [2022-04-05 04:13:51,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944315314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374052704] [2022-04-05 04:13:51,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,248 INFO L87 Difference]: Start difference. First operand 5641 states and 7303 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) [2022-04-05 04:13:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,307 INFO L93 Difference]: Finished difference Result 7307 states and 9224 transitions. [2022-04-05 04:13:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,307 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 [2022-04-05 04:13:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,325 INFO L225 Difference]: With dead ends: 7307 [2022-04-05 04:13:51,325 INFO L226 Difference]: Without dead ends: 7307 [2022-04-05 04:13:51,325 INFO L912 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 [2022-04-05 04:13:51,326 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 109 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2022-04-05 04:13:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7305. [2022-04-05 04:13:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7301 states have (on average 1.2628407067524996) internal successors, (9220), 7301 states have internal predecessors, (9220), 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) [2022-04-05 04:13:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 9223 transitions. [2022-04-05 04:13:51,416 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 9223 transitions. Word has length 28 [2022-04-05 04:13:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,417 INFO L478 AbstractCegarLoop]: Abstraction has 7305 states and 9223 transitions. [2022-04-05 04:13:51,417 INFO L479 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) [2022-04-05 04:13:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 9223 transitions. [2022-04-05 04:13:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:13:51,423 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,423 INFO L499 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] [2022-04-05 04:13:51,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-05 04:13:51,423 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash 456305864, now seen corresponding path program 1 times [2022-04-05 04:13:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483521774] [2022-04-05 04:13:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483521774] [2022-04-05 04:13:51,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483521774] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753277778] [2022-04-05 04:13:51,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,446 INFO L87 Difference]: Start difference. First operand 7305 states and 9223 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) [2022-04-05 04:13:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,535 INFO L93 Difference]: Finished difference Result 7435 states and 9224 transitions. [2022-04-05 04:13:51,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,535 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 [2022-04-05 04:13:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,548 INFO L225 Difference]: With dead ends: 7435 [2022-04-05 04:13:51,548 INFO L226 Difference]: Without dead ends: 7435 [2022-04-05 04:13:51,549 INFO L912 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 [2022-04-05 04:13:51,550 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 92 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2022-04-05 04:13:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7433. [2022-04-05 04:13:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7429 states have (on average 1.2410822452550814) internal successors, (9220), 7429 states have internal predecessors, (9220), 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) [2022-04-05 04:13:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 9223 transitions. [2022-04-05 04:13:51,649 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 9223 transitions. Word has length 29 [2022-04-05 04:13:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,649 INFO L478 AbstractCegarLoop]: Abstraction has 7433 states and 9223 transitions. [2022-04-05 04:13:51,649 INFO L479 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) [2022-04-05 04:13:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 9223 transitions. [2022-04-05 04:13:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:13:51,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,655 INFO L499 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] [2022-04-05 04:13:51,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-05 04:13:51,655 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash -49252761, now seen corresponding path program 1 times [2022-04-05 04:13:51,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372170382] [2022-04-05 04:13:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372170382] [2022-04-05 04:13:51,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372170382] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531763642] [2022-04-05 04:13:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,677 INFO L87 Difference]: Start difference. First operand 7433 states and 9223 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) [2022-04-05 04:13:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,744 INFO L93 Difference]: Finished difference Result 12299 states and 15112 transitions. [2022-04-05 04:13:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,745 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 [2022-04-05 04:13:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,763 INFO L225 Difference]: With dead ends: 12299 [2022-04-05 04:13:51,763 INFO L226 Difference]: Without dead ends: 12299 [2022-04-05 04:13:51,763 INFO L912 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 [2022-04-05 04:13:51,763 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2022-04-05 04:13:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11273. [2022-04-05 04:13:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.2043659597124856) internal successors, (13572), 11269 states have internal predecessors, (13572), 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) [2022-04-05 04:13:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 13575 transitions. [2022-04-05 04:13:51,896 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 13575 transitions. Word has length 29 [2022-04-05 04:13:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,897 INFO L478 AbstractCegarLoop]: Abstraction has 11273 states and 13575 transitions. [2022-04-05 04:13:51,897 INFO L479 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) [2022-04-05 04:13:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 13575 transitions. [2022-04-05 04:13:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:13:51,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,949 INFO L499 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] [2022-04-05 04:13:51,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-05 04:13:51,949 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash -342655768, now seen corresponding path program 1 times [2022-04-05 04:13:51,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898735212] [2022-04-05 04:13:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898735212] [2022-04-05 04:13:51,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898735212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683185258] [2022-04-05 04:13:51,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,979 INFO L87 Difference]: Start difference. First operand 11273 states and 13575 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) [2022-04-05 04:13:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,047 INFO L93 Difference]: Finished difference Result 14347 states and 16648 transitions. [2022-04-05 04:13:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,048 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 [2022-04-05 04:13:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,067 INFO L225 Difference]: With dead ends: 14347 [2022-04-05 04:13:52,067 INFO L226 Difference]: Without dead ends: 14347 [2022-04-05 04:13:52,068 INFO L912 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 [2022-04-05 04:13:52,068 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:52,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2022-04-05 04:13:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14345. [2022-04-05 04:13:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.1605885224182415) internal successors, (16644), 14341 states have internal predecessors, (16644), 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) [2022-04-05 04:13:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 16647 transitions. [2022-04-05 04:13:52,273 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 16647 transitions. Word has length 29 [2022-04-05 04:13:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,273 INFO L478 AbstractCegarLoop]: Abstraction has 14345 states and 16647 transitions. [2022-04-05 04:13:52,273 INFO L479 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) [2022-04-05 04:13:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 16647 transitions. [2022-04-05 04:13:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:13:52,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,291 INFO L499 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] [2022-04-05 04:13:52,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-05 04:13:52,291 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1526802582, now seen corresponding path program 1 times [2022-04-05 04:13:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232706583] [2022-04-05 04:13:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:52,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232706583] [2022-04-05 04:13:52,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232706583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:52,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:52,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759297030] [2022-04-05 04:13:52,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:52,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:52,317 INFO L87 Difference]: Start difference. First operand 14345 states and 16647 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) [2022-04-05 04:13:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,421 INFO L93 Difference]: Finished difference Result 14603 states and 16648 transitions. [2022-04-05 04:13:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,421 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 [2022-04-05 04:13:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,447 INFO L225 Difference]: With dead ends: 14603 [2022-04-05 04:13:52,447 INFO L226 Difference]: Without dead ends: 14603 [2022-04-05 04:13:52,447 INFO L912 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 [2022-04-05 04:13:52,448 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 123 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:52,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2022-04-05 04:13:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14601. [2022-04-05 04:13:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14601 states, 14597 states have (on average 1.1402342947180928) internal successors, (16644), 14597 states have internal predecessors, (16644), 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) [2022-04-05 04:13:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 16647 transitions. [2022-04-05 04:13:52,660 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 16647 transitions. Word has length 30 [2022-04-05 04:13:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,660 INFO L478 AbstractCegarLoop]: Abstraction has 14601 states and 16647 transitions. [2022-04-05 04:13:52,660 INFO L479 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) [2022-04-05 04:13:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 16647 transitions. [2022-04-05 04:13:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:13:52,675 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,675 INFO L499 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] [2022-04-05 04:13:52,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-05 04:13:52,676 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2032361207, now seen corresponding path program 1 times [2022-04-05 04:13:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049244820] [2022-04-05 04:13:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:52,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049244820] [2022-04-05 04:13:52,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049244820] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:52,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:52,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:52,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780280573] [2022-04-05 04:13:52,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:52,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:52,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:52,700 INFO L87 Difference]: Start difference. First operand 14601 states and 16647 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) [2022-04-05 04:13:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,784 INFO L93 Difference]: Finished difference Result 23561 states and 26119 transitions. [2022-04-05 04:13:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,785 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 [2022-04-05 04:13:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,816 INFO L225 Difference]: With dead ends: 23561 [2022-04-05 04:13:52,816 INFO L226 Difference]: Without dead ends: 23561 [2022-04-05 04:13:52,816 INFO L912 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 [2022-04-05 04:13:52,817 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 104 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:52,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 68 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23561 states. [2022-04-05 04:13:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23561 to 22537. [2022-04-05 04:13:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22537 states, 22533 states have (on average 1.1135667687391826) internal successors, (25092), 22533 states have internal predecessors, (25092), 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) [2022-04-05 04:13:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22537 states to 22537 states and 25095 transitions. [2022-04-05 04:13:53,126 INFO L78 Accepts]: Start accepts. Automaton has 22537 states and 25095 transitions. Word has length 30 [2022-04-05 04:13:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:53,126 INFO L478 AbstractCegarLoop]: Abstraction has 22537 states and 25095 transitions. [2022-04-05 04:13:53,126 INFO L479 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) [2022-04-05 04:13:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 22537 states and 25095 transitions. [2022-04-05 04:13:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:13:53,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:53,147 INFO L499 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] [2022-04-05 04:13:53,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-05 04:13:53,147 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1969203082, now seen corresponding path program 1 times [2022-04-05 04:13:53,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:53,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671382132] [2022-04-05 04:13:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:53,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:53,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:53,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671382132] [2022-04-05 04:13:53,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671382132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:53,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:53,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809524627] [2022-04-05 04:13:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:53,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:53,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:53,171 INFO L87 Difference]: Start difference. First operand 22537 states and 25095 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) [2022-04-05 04:13:53,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:53,276 INFO L93 Difference]: Finished difference Result 28167 states and 29702 transitions. [2022-04-05 04:13:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:53,277 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 [2022-04-05 04:13:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:53,277 INFO L225 Difference]: With dead ends: 28167 [2022-04-05 04:13:53,277 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 04:13:53,278 INFO L912 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 [2022-04-05 04:13:53,278 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 91 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:53,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 112 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 04:13:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 04:13:53,279 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) [2022-04-05 04:13:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 04:13:53,279 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2022-04-05 04:13:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:53,279 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 04:13:53,279 INFO L479 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) [2022-04-05 04:13:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 04:13:53,279 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 04:13:53,281 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 04:13:53,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-05 04:13:53,286 INFO L719 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] [2022-04-05 04:13:53,287 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 04:13:53,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:13:53 BasicIcfg [2022-04-05 04:13:53,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 04:13:53,289 INFO L158 Benchmark]: Toolchain (without parser) took 6058.75ms. Allocated memory was 211.8MB in the beginning and 556.8MB in the end (delta: 345.0MB). Free memory was 186.3MB in the beginning and 317.0MB in the end (delta: -130.6MB). Peak memory consumption was 213.7MB. Max. memory is 8.0GB. [2022-04-05 04:13:53,289 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory is still 174.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 04:13:53,289 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.68ms. Allocated memory is still 211.8MB. Free memory was 186.2MB in the beginning and 184.9MB in the end (delta: 1.3MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. [2022-04-05 04:13:53,289 INFO L158 Benchmark]: Boogie Preprocessor took 50.84ms. Allocated memory is still 211.8MB. Free memory was 184.9MB in the beginning and 183.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 04:13:53,289 INFO L158 Benchmark]: RCFGBuilder took 289.77ms. Allocated memory is still 211.8MB. Free memory was 183.2MB in the beginning and 170.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-05 04:13:53,289 INFO L158 Benchmark]: IcfgTransformer took 44.78ms. Allocated memory is still 211.8MB. Free memory was 170.6MB in the beginning and 169.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 04:13:53,290 INFO L158 Benchmark]: TraceAbstraction took 5480.87ms. Allocated memory was 211.8MB in the beginning and 556.8MB in the end (delta: 345.0MB). Free memory was 168.8MB in the beginning and 317.0MB in the end (delta: -148.2MB). Peak memory consumption was 197.5MB. Max. memory is 8.0GB. [2022-04-05 04:13:53,290 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory is still 174.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.68ms. Allocated memory is still 211.8MB. Free memory was 186.2MB in the beginning and 184.9MB in the end (delta: 1.3MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.84ms. Allocated memory is still 211.8MB. Free memory was 184.9MB in the beginning and 183.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 289.77ms. Allocated memory is still 211.8MB. Free memory was 183.2MB in the beginning and 170.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 44.78ms. Allocated memory is still 211.8MB. Free memory was 170.6MB in the beginning and 169.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 5480.87ms. Allocated memory was 211.8MB in the beginning and 556.8MB in the end (delta: 345.0MB). Free memory was 168.8MB in the beginning and 317.0MB in the end (delta: -148.2MB). Peak memory consumption was 197.5MB. 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: 163]: 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, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3720 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3720 mSDsluCounter, 2693 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1747 IncrementalHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 2488 mSDtfsCounter, 1747 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22537occurred in iteration=28, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 29 MinimizatonAttempts, 4126 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 744 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1579 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 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! [2022-04-05 04:13:53,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...