/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_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 04:13:48,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 04:13:48,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 04:13:48,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 04:13:48,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 04:13:48,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 04:13:48,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 04:13:48,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 04:13:48,402 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 04:13:48,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 04:13:48,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 04:13:48,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 04:13:48,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 04:13:48,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 04:13:48,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 04:13:48,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 04:13:48,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 04:13:48,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 04:13:48,405 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 04:13:48,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 04:13:48,405 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 04:13:48,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 04:13:48,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 04:13:48,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 04:13:48,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 04:13:48,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 04:13:48,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:13:48,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 04:13:48,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 04:13:48,407 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 04:13:48,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 04:13:48,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 04:13:48,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 04:13:48,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 04:13:48,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 04:13:48,597 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 04:13:48,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2022-04-05 04:13:48,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a540101a6/a70a1fae2ff34306824f17d5f3363ab9/FLAG512f8dc63 [2022-04-05 04:13:48,983 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 04:13:48,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2022-04-05 04:13:48,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a540101a6/a70a1fae2ff34306824f17d5f3363ab9/FLAG512f8dc63 [2022-04-05 04:13:49,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a540101a6/a70a1fae2ff34306824f17d5f3363ab9 [2022-04-05 04:13:49,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 04:13:49,004 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 04:13:49,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 04:13:49,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 04:13:49,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 04:13:49,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461844b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49, skipping insertion in model container [2022-04-05 04:13:49,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 04:13:49,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 04:13:49,199 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_11.c[4246,4259] [2022-04-05 04:13:49,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:13:49,211 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 04:13:49,242 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_11.c[4246,4259] [2022-04-05 04:13:49,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:13:49,251 INFO L208 MainTranslator]: Completed translation [2022-04-05 04:13:49,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49 WrapperNode [2022-04-05 04:13:49,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 04:13:49,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 04:13:49,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 04:13:49,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 04:13:49,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 04:13:49,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 04:13:49,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 04:13:49,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 04:13:49,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:13:49,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:13:49,325 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 04:13:49,354 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 04:13:49,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 04:13:49,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 04:13:49,380 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 04:13:49,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 04:13:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 04:13:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 04:13:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 04:13:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 04:13:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 04:13:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 04:13:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 04:13:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 04:13:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 04:13:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 04:13:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 04:13:49,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 04:13:49,449 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 04:13:49,450 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 04:13:49,649 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 04:13:49,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 04:13:49,653 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 04:13:49,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:13:49 BoogieIcfgContainer [2022-04-05 04:13:49,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 04:13:49,658 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 04:13:49,658 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 04:13:49,663 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 04:13:49,665 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:13:49" (1/1) ... [2022-04-05 04:13:49,667 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 04:13:49,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:13:49 BasicIcfg [2022-04-05 04:13:49,682 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 04:13:49,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 04:13:49,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 04:13:49,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 04:13:49,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 04:13:49" (1/4) ... [2022-04-05 04:13:49,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9582e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:13:49, skipping insertion in model container [2022-04-05 04:13:49,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:13:49" (2/4) ... [2022-04-05 04:13:49,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9582e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:13:49, skipping insertion in model container [2022-04-05 04:13:49,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:13:49" (3/4) ... [2022-04-05 04:13:49,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9582e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:13:49, skipping insertion in model container [2022-04-05 04:13:49,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:13:49" (4/4) ... [2022-04-05 04:13:49,687 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.cJordan [2022-04-05 04:13:49,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 04:13:49,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 04:13:49,721 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 04:13:49,726 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 04:13:49,726 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 04:13:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 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 04:13:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 04:13:49,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:49,740 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] [2022-04-05 04:13:49,740 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:49,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1766201146, now seen corresponding path program 1 times [2022-04-05 04:13:49,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:49,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229425185] [2022-04-05 04:13:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:49,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:49,971 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 04:13:49,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:49,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229425185] [2022-04-05 04:13:49,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229425185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:49,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:49,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034052094] [2022-04-05 04:13:49,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:49,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:49,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:49,999 INFO L87 Difference]: Start difference. First operand has 48 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 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 4.75) 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 04:13:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,185 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2022-04-05 04:13:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,188 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 04:13:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,203 INFO L225 Difference]: With dead ends: 87 [2022-04-05 04:13:50,204 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 04:13:50,206 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 04:13:50,211 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 191 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 95 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 04:13:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2022-04-05 04:13:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 98 transitions. [2022-04-05 04:13:50,248 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 98 transitions. Word has length 22 [2022-04-05 04:13:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,249 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 98 transitions. [2022-04-05 04:13:50,249 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 04:13:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 98 transitions. [2022-04-05 04:13:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 04:13:50,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,250 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 04:13:50,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 04:13:50,251 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2023207525, now seen corresponding path program 1 times [2022-04-05 04:13:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471690675] [2022-04-05 04:13:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,318 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 04:13:50,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471690675] [2022-04-05 04:13:50,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471690675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286418243] [2022-04-05 04:13:50,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,322 INFO L87 Difference]: Start difference. First operand 55 states and 98 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 04:13:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,417 INFO L93 Difference]: Finished difference Result 79 states and 139 transitions. [2022-04-05 04:13:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,417 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 04:13:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,418 INFO L225 Difference]: With dead ends: 79 [2022-04-05 04:13:50,418 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 04:13:50,419 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 04:13:50,419 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,420 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 103 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 04:13:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-04-05 04:13:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 73 states have internal predecessors, (135), 2 states have call successors, (2), 2 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 04:13:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 138 transitions. [2022-04-05 04:13:50,477 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 138 transitions. Word has length 22 [2022-04-05 04:13:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,477 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 138 transitions. [2022-04-05 04:13:50,477 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 04:13:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 138 transitions. [2022-04-05 04:13:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:13:50,478 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,478 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 04:13:50,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 04:13:50,478 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1082371358, now seen corresponding path program 1 times [2022-04-05 04:13:50,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732796675] [2022-04-05 04:13:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,491 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 04:13:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732796675] [2022-04-05 04:13:50,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732796675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202103314] [2022-04-05 04:13:50,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,517 INFO L87 Difference]: Start difference. First operand 77 states and 138 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 04:13:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,580 INFO L93 Difference]: Finished difference Result 82 states and 141 transitions. [2022-04-05 04:13:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,580 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 04:13:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,581 INFO L225 Difference]: With dead ends: 82 [2022-04-05 04:13:50,581 INFO L226 Difference]: Without dead ends: 82 [2022-04-05 04:13:50,581 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 04:13:50,582 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-05 04:13:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-04-05 04:13:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 76 states have internal predecessors, (137), 2 states have call successors, (2), 2 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 04:13:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 140 transitions. [2022-04-05 04:13:50,587 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 140 transitions. Word has length 23 [2022-04-05 04:13:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,587 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 140 transitions. [2022-04-05 04:13:50,587 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 04:13:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 140 transitions. [2022-04-05 04:13:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:13:50,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,588 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 04:13:50,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 04:13:50,588 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1705044129, now seen corresponding path program 1 times [2022-04-05 04:13:50,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526178954] [2022-04-05 04:13:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526178954] [2022-04-05 04:13:50,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526178954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732608754] [2022-04-05 04:13:50,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,639 INFO L87 Difference]: Start difference. First operand 80 states and 140 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 04:13:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,733 INFO L93 Difference]: Finished difference Result 147 states and 262 transitions. [2022-04-05 04:13:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,733 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 04:13:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,734 INFO L225 Difference]: With dead ends: 147 [2022-04-05 04:13:50,735 INFO L226 Difference]: Without dead ends: 147 [2022-04-05 04:13:50,735 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 04:13:50,736 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-05 04:13:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2022-04-05 04:13:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.801980198019802) internal successors, (182), 101 states have internal predecessors, (182), 2 states have call successors, (2), 2 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 04:13:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 185 transitions. [2022-04-05 04:13:50,743 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 185 transitions. Word has length 23 [2022-04-05 04:13:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,743 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 185 transitions. [2022-04-05 04:13:50,743 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 04:13:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 185 transitions. [2022-04-05 04:13:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:13:50,744 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,744 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] [2022-04-05 04:13:50,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 04:13:50,744 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2084364542, now seen corresponding path program 1 times [2022-04-05 04:13:50,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820483223] [2022-04-05 04:13:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,788 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 04:13:50,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820483223] [2022-04-05 04:13:50,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820483223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50190639] [2022-04-05 04:13:50,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,790 INFO L87 Difference]: Start difference. First operand 105 states and 185 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 04:13:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,848 INFO L93 Difference]: Finished difference Result 149 states and 260 transitions. [2022-04-05 04:13:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,849 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 04:13:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,850 INFO L225 Difference]: With dead ends: 149 [2022-04-05 04:13:50,850 INFO L226 Difference]: Without dead ends: 149 [2022-04-05 04:13:50,850 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 04:13:50,851 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 105 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-05 04:13:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-04-05 04:13:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.7902097902097902) internal successors, (256), 143 states have internal predecessors, (256), 2 states have call successors, (2), 2 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 04:13:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 259 transitions. [2022-04-05 04:13:50,872 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 259 transitions. Word has length 23 [2022-04-05 04:13:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,872 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 259 transitions. [2022-04-05 04:13:50,872 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 04:13:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 259 transitions. [2022-04-05 04:13:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 04:13:50,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:50,873 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 04:13:50,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-05 04:13:50,873 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1316728287, now seen corresponding path program 1 times [2022-04-05 04:13:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:50,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469996001] [2022-04-05 04:13:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:50,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:50,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:50,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469996001] [2022-04-05 04:13:50,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469996001] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:50,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:50,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:50,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669875648] [2022-04-05 04:13:50,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:50,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:50,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:50,917 INFO L87 Difference]: Start difference. First operand 147 states and 259 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 04:13:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:50,978 INFO L93 Difference]: Finished difference Result 151 states and 260 transitions. [2022-04-05 04:13:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:50,978 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 04:13:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:50,979 INFO L225 Difference]: With dead ends: 151 [2022-04-05 04:13:50,979 INFO L226 Difference]: Without dead ends: 151 [2022-04-05 04:13:50,979 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 04:13:50,980 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 143 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:50,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 120 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-05 04:13:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-04-05 04:13:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.7655172413793103) internal successors, (256), 145 states have internal predecessors, (256), 2 states have call successors, (2), 2 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 04:13:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 259 transitions. [2022-04-05 04:13:50,999 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 259 transitions. Word has length 24 [2022-04-05 04:13:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:50,999 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 259 transitions. [2022-04-05 04:13:50,999 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 04:13:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 259 transitions. [2022-04-05 04:13:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 04:13:51,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,000 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 04:13:51,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-05 04:13:51,000 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash 190823522, now seen corresponding path program 1 times [2022-04-05 04:13:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474017466] [2022-04-05 04:13:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,041 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 04:13:51,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474017466] [2022-04-05 04:13:51,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474017466] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625349820] [2022-04-05 04:13:51,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,043 INFO L87 Difference]: Start difference. First operand 149 states and 259 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 04:13:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,133 INFO L93 Difference]: Finished difference Result 275 states and 484 transitions. [2022-04-05 04:13:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,134 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 04:13:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,135 INFO L225 Difference]: With dead ends: 275 [2022-04-05 04:13:51,136 INFO L226 Difference]: Without dead ends: 275 [2022-04-05 04:13:51,136 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]: 75 mSDtfsCounter, 171 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-05 04:13:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 201. [2022-04-05 04:13:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.7461928934010151) internal successors, (344), 197 states have internal predecessors, (344), 2 states have call successors, (2), 2 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 04:13:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 347 transitions. [2022-04-05 04:13:51,146 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 347 transitions. Word has length 24 [2022-04-05 04:13:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,146 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 347 transitions. [2022-04-05 04:13:51,146 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 04:13:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 347 transitions. [2022-04-05 04:13:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 04:13:51,151 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,151 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 04:13:51,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-05 04:13:51,152 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -314735103, now seen corresponding path program 1 times [2022-04-05 04:13:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050623665] [2022-04-05 04:13:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050623665] [2022-04-05 04:13:51,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050623665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791846542] [2022-04-05 04:13:51,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,211 INFO L87 Difference]: Start difference. First operand 201 states and 347 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 04:13:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,301 INFO L93 Difference]: Finished difference Result 283 states and 484 transitions. [2022-04-05 04:13:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,302 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 04:13:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,303 INFO L225 Difference]: With dead ends: 283 [2022-04-05 04:13:51,303 INFO L226 Difference]: Without dead ends: 283 [2022-04-05 04:13:51,304 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 04:13:51,304 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 107 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-05 04:13:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2022-04-05 04:13:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 277 states have (on average 1.7328519855595668) internal successors, (480), 277 states have internal predecessors, (480), 2 states have call successors, (2), 2 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 04:13:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 483 transitions. [2022-04-05 04:13:51,321 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 483 transitions. Word has length 24 [2022-04-05 04:13:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,321 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 483 transitions. [2022-04-05 04:13:51,321 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 04:13:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 483 transitions. [2022-04-05 04:13:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:13:51,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,323 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 04:13:51,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-05 04:13:51,323 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1620594170, now seen corresponding path program 1 times [2022-04-05 04:13:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959571291] [2022-04-05 04:13:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,378 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 04:13:51,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959571291] [2022-04-05 04:13:51,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959571291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291785272] [2022-04-05 04:13:51,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,380 INFO L87 Difference]: Start difference. First operand 281 states and 483 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 04:13:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,444 INFO L93 Difference]: Finished difference Result 287 states and 484 transitions. [2022-04-05 04:13:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,444 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 04:13:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,445 INFO L225 Difference]: With dead ends: 287 [2022-04-05 04:13:51,445 INFO L226 Difference]: Without dead ends: 287 [2022-04-05 04:13:51,446 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 04:13:51,446 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 117 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-05 04:13:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-04-05 04:13:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 281 states have (on average 1.708185053380783) internal successors, (480), 281 states have internal predecessors, (480), 2 states have call successors, (2), 2 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 04:13:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 483 transitions. [2022-04-05 04:13:51,451 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 483 transitions. Word has length 25 [2022-04-05 04:13:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,452 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 483 transitions. [2022-04-05 04:13:51,452 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 04:13:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 483 transitions. [2022-04-05 04:13:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:13:51,452 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,452 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 04:13:51,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-05 04:13:51,453 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1166821317, now seen corresponding path program 1 times [2022-04-05 04:13:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118893557] [2022-04-05 04:13:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118893557] [2022-04-05 04:13:51,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118893557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4980032] [2022-04-05 04:13:51,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,480 INFO L87 Difference]: Start difference. First operand 285 states and 483 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 04:13:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,539 INFO L93 Difference]: Finished difference Result 547 states and 912 transitions. [2022-04-05 04:13:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,539 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 04:13:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,541 INFO L225 Difference]: With dead ends: 547 [2022-04-05 04:13:51,541 INFO L226 Difference]: Without dead ends: 547 [2022-04-05 04:13:51,542 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 04:13:51,542 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 87 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-04-05 04:13:51,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2022-04-05 04:13:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 541 states have (on average 1.6783733826247689) internal successors, (908), 541 states have internal predecessors, (908), 2 states have call successors, (2), 2 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 04:13:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 911 transitions. [2022-04-05 04:13:51,551 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 911 transitions. Word has length 25 [2022-04-05 04:13:51,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,551 INFO L478 AbstractCegarLoop]: Abstraction has 545 states and 911 transitions. [2022-04-05 04:13:51,551 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 04:13:51,551 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 911 transitions. [2022-04-05 04:13:51,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:13:51,552 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,552 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 04:13:51,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-05 04:13:51,552 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash -661262692, now seen corresponding path program 1 times [2022-04-05 04:13:51,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172410517] [2022-04-05 04:13:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,576 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 04:13:51,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172410517] [2022-04-05 04:13:51,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172410517] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711718505] [2022-04-05 04:13:51,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,578 INFO L87 Difference]: Start difference. First operand 545 states and 911 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 04:13:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,641 INFO L93 Difference]: Finished difference Result 675 states and 1144 transitions. [2022-04-05 04:13:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,642 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 04:13:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,644 INFO L225 Difference]: With dead ends: 675 [2022-04-05 04:13:51,645 INFO L226 Difference]: Without dead ends: 675 [2022-04-05 04:13:51,645 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 04:13:51,646 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:13:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-04-05 04:13:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 545. [2022-04-05 04:13:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 541 states have (on average 1.6635859519408502) internal successors, (900), 541 states have internal predecessors, (900), 2 states have call successors, (2), 2 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 04:13:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 903 transitions. [2022-04-05 04:13:51,656 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 903 transitions. Word has length 25 [2022-04-05 04:13:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,656 INFO L478 AbstractCegarLoop]: Abstraction has 545 states and 903 transitions. [2022-04-05 04:13:51,656 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 04:13:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 903 transitions. [2022-04-05 04:13:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 04:13:51,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,657 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 04:13:51,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-05 04:13:51,657 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1811690051, now seen corresponding path program 1 times [2022-04-05 04:13:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454022503] [2022-04-05 04:13:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454022503] [2022-04-05 04:13:51,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454022503] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22251071] [2022-04-05 04:13:51,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,682 INFO L87 Difference]: Start difference. First operand 545 states and 903 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 04:13:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,740 INFO L93 Difference]: Finished difference Result 995 states and 1664 transitions. [2022-04-05 04:13:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,740 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 04:13:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,743 INFO L225 Difference]: With dead ends: 995 [2022-04-05 04:13:51,743 INFO L226 Difference]: Without dead ends: 995 [2022-04-05 04:13:51,743 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 04:13:51,743 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-04-05 04:13:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 769. [2022-04-05 04:13:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 765 states have (on average 1.6261437908496732) internal successors, (1244), 765 states have internal predecessors, (1244), 2 states have call successors, (2), 2 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 04:13:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1247 transitions. [2022-04-05 04:13:51,755 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1247 transitions. Word has length 26 [2022-04-05 04:13:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,755 INFO L478 AbstractCegarLoop]: Abstraction has 769 states and 1247 transitions. [2022-04-05 04:13:51,756 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 04:13:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1247 transitions. [2022-04-05 04:13:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 04:13:51,757 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,757 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 04:13:51,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-05 04:13:51,757 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1977718620, now seen corresponding path program 1 times [2022-04-05 04:13:51,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377220261] [2022-04-05 04:13:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377220261] [2022-04-05 04:13:51,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377220261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806808755] [2022-04-05 04:13:51,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,780 INFO L87 Difference]: Start difference. First operand 769 states and 1247 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 04:13:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,837 INFO L93 Difference]: Finished difference Result 1059 states and 1704 transitions. [2022-04-05 04:13:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,837 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 04:13:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,840 INFO L225 Difference]: With dead ends: 1059 [2022-04-05 04:13:51,840 INFO L226 Difference]: Without dead ends: 1059 [2022-04-05 04:13:51,840 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 04:13:51,841 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 111 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-04-05 04:13:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1057. [2022-04-05 04:13:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1053 states have (on average 1.6144349477682811) internal successors, (1700), 1053 states have internal predecessors, (1700), 2 states have call successors, (2), 2 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 04:13:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1703 transitions. [2022-04-05 04:13:51,855 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1703 transitions. Word has length 26 [2022-04-05 04:13:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,855 INFO L478 AbstractCegarLoop]: Abstraction has 1057 states and 1703 transitions. [2022-04-05 04:13:51,856 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 04:13:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1703 transitions. [2022-04-05 04:13:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:13:51,856 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,857 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 04:13:51,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-05 04:13:51,857 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash -327784201, now seen corresponding path program 1 times [2022-04-05 04:13:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4502381] [2022-04-05 04:13:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4502381] [2022-04-05 04:13:51,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4502381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225157987] [2022-04-05 04:13:51,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,879 INFO L87 Difference]: Start difference. First operand 1057 states and 1703 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 04:13:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:51,934 INFO L93 Difference]: Finished difference Result 1083 states and 1720 transitions. [2022-04-05 04:13:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:51,934 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 04:13:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:51,937 INFO L225 Difference]: With dead ends: 1083 [2022-04-05 04:13:51,937 INFO L226 Difference]: Without dead ends: 1083 [2022-04-05 04:13:51,937 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 04:13:51,938 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:51,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 111 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-04-05 04:13:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1081. [2022-04-05 04:13:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1077 states have (on average 1.5933147632311977) internal successors, (1716), 1077 states have internal predecessors, (1716), 2 states have call successors, (2), 2 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 04:13:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1719 transitions. [2022-04-05 04:13:51,966 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1719 transitions. Word has length 27 [2022-04-05 04:13:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:51,966 INFO L478 AbstractCegarLoop]: Abstraction has 1081 states and 1719 transitions. [2022-04-05 04:13:51,966 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 04:13:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1719 transitions. [2022-04-05 04:13:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:13:51,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:51,967 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 04:13:51,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-05 04:13:51,967 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1179767608, now seen corresponding path program 1 times [2022-04-05 04:13:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:51,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341931047] [2022-04-05 04:13:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:51,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:51,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341931047] [2022-04-05 04:13:51,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341931047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:51,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:51,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:51,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098776331] [2022-04-05 04:13:51,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:51,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:51,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:51,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:51,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:51,988 INFO L87 Difference]: Start difference. First operand 1081 states and 1719 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 04:13:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,043 INFO L93 Difference]: Finished difference Result 1931 states and 3096 transitions. [2022-04-05 04:13:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,044 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 04:13:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,048 INFO L225 Difference]: With dead ends: 1931 [2022-04-05 04:13:52,049 INFO L226 Difference]: Without dead ends: 1931 [2022-04-05 04:13:52,049 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 04:13:52,049 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:52,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 79 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-04-05 04:13:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1545. [2022-04-05 04:13:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1541 states have (on average 1.5496430889033095) internal successors, (2388), 1541 states have internal predecessors, (2388), 2 states have call successors, (2), 2 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 04:13:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2391 transitions. [2022-04-05 04:13:52,069 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2391 transitions. Word has length 27 [2022-04-05 04:13:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,069 INFO L478 AbstractCegarLoop]: Abstraction has 1545 states and 2391 transitions. [2022-04-05 04:13:52,069 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 04:13:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2391 transitions. [2022-04-05 04:13:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 04:13:52,070 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,071 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 04:13:52,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-05 04:13:52,071 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,071 INFO L85 PathProgramCache]: Analyzing trace with hash 674208983, now seen corresponding path program 1 times [2022-04-05 04:13:52,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597117470] [2022-04-05 04:13:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,090 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 04:13:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597117470] [2022-04-05 04:13:52,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597117470] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:52,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:52,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:52,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938890608] [2022-04-05 04:13:52,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:52,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:52,091 INFO L87 Difference]: Start difference. First operand 1545 states and 2391 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 04:13:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,147 INFO L93 Difference]: Finished difference Result 2091 states and 3208 transitions. [2022-04-05 04:13:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,148 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 04:13:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,152 INFO L225 Difference]: With dead ends: 2091 [2022-04-05 04:13:52,153 INFO L226 Difference]: Without dead ends: 2091 [2022-04-05 04:13:52,153 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 04:13:52,153 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:52,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-04-05 04:13:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2089. [2022-04-05 04:13:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2085 states have (on average 1.5366906474820143) internal successors, (3204), 2085 states have internal predecessors, (3204), 2 states have call successors, (2), 2 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 04:13:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3207 transitions. [2022-04-05 04:13:52,180 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3207 transitions. Word has length 27 [2022-04-05 04:13:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,180 INFO L478 AbstractCegarLoop]: Abstraction has 2089 states and 3207 transitions. [2022-04-05 04:13:52,180 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 04:13:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3207 transitions. [2022-04-05 04:13:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:13:52,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,182 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 04:13:52,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-05 04:13:52,182 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2081877160, now seen corresponding path program 1 times [2022-04-05 04:13:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503662549] [2022-04-05 04:13:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,201 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 04:13:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503662549] [2022-04-05 04:13:52,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503662549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:52,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:52,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264312138] [2022-04-05 04:13:52,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:52,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:52,203 INFO L87 Difference]: Start difference. First operand 2089 states and 3207 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 04:13:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,259 INFO L93 Difference]: Finished difference Result 2123 states and 3208 transitions. [2022-04-05 04:13:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,259 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 04:13:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,264 INFO L225 Difference]: With dead ends: 2123 [2022-04-05 04:13:52,264 INFO L226 Difference]: Without dead ends: 2123 [2022-04-05 04:13:52,264 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 04:13:52,265 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 108 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 04:13:52,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 108 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-04-05 04:13:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2121. [2022-04-05 04:13:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2117 states have (on average 1.5134624468587623) internal successors, (3204), 2117 states have internal predecessors, (3204), 2 states have call successors, (2), 2 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 04:13:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 3207 transitions. [2022-04-05 04:13:52,292 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 3207 transitions. Word has length 28 [2022-04-05 04:13:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,292 INFO L478 AbstractCegarLoop]: Abstraction has 2121 states and 3207 transitions. [2022-04-05 04:13:52,292 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 04:13:52,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 3207 transitions. [2022-04-05 04:13:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:13:52,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,294 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 04:13:52,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-05 04:13:52,294 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash -574325351, now seen corresponding path program 1 times [2022-04-05 04:13:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831739534] [2022-04-05 04:13:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,299 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 04:13:52,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831739534] [2022-04-05 04:13:52,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831739534] 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 [20888753] [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 2121 states and 3207 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 04:13:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,405 INFO L93 Difference]: Finished difference Result 3723 states and 5672 transitions. [2022-04-05 04:13:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,406 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 04:13:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,414 INFO L225 Difference]: With dead ends: 3723 [2022-04-05 04:13:52,414 INFO L226 Difference]: Without dead ends: 3723 [2022-04-05 04:13:52,415 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 04:13:52,415 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 143 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:52,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 78 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-04-05 04:13:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3081. [2022-04-05 04:13:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3077 states have (on average 1.4676633084172896) internal successors, (4516), 3077 states have internal predecessors, (4516), 2 states have call successors, (2), 2 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 04:13:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4519 transitions. [2022-04-05 04:13:52,457 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4519 transitions. Word has length 28 [2022-04-05 04:13:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,457 INFO L478 AbstractCegarLoop]: Abstraction has 3081 states and 4519 transitions. [2022-04-05 04:13:52,457 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 04:13:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4519 transitions. [2022-04-05 04:13:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:13:52,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,460 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 04:13:52,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-05 04:13:52,460 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1079883976, now seen corresponding path program 1 times [2022-04-05 04:13:52,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211256227] [2022-04-05 04:13:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,479 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 04:13:52,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211256227] [2022-04-05 04:13:52,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211256227] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:52,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:52,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647770485] [2022-04-05 04:13:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:52,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:52,480 INFO L87 Difference]: Start difference. First operand 3081 states and 4519 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 04:13:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,542 INFO L93 Difference]: Finished difference Result 4107 states and 5960 transitions. [2022-04-05 04:13:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,542 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 04:13:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,554 INFO L225 Difference]: With dead ends: 4107 [2022-04-05 04:13:52,554 INFO L226 Difference]: Without dead ends: 4107 [2022-04-05 04:13:52,554 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 04:13:52,554 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:52,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 115 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-04-05 04:13:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4105. [2022-04-05 04:13:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.4523287003169958) internal successors, (5956), 4101 states have internal predecessors, (5956), 2 states have call successors, (2), 2 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 04:13:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5959 transitions. [2022-04-05 04:13:52,609 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5959 transitions. Word has length 28 [2022-04-05 04:13:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,609 INFO L478 AbstractCegarLoop]: Abstraction has 4105 states and 5959 transitions. [2022-04-05 04:13:52,609 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 04:13:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5959 transitions. [2022-04-05 04:13:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:13:52,612 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,612 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 04:13:52,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-05 04:13:52,613 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,613 INFO L85 PathProgramCache]: Analyzing trace with hash -624183917, now seen corresponding path program 1 times [2022-04-05 04:13:52,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043098431] [2022-04-05 04:13:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:52,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043098431] [2022-04-05 04:13:52,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043098431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:52,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:52,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:52,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579625975] [2022-04-05 04:13:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:52,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:52,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:52,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:52,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:52,632 INFO L87 Difference]: Start difference. First operand 4105 states and 5959 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 04:13:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,689 INFO L93 Difference]: Finished difference Result 4171 states and 5960 transitions. [2022-04-05 04:13:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,689 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 04:13:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,701 INFO L225 Difference]: With dead ends: 4171 [2022-04-05 04:13:52,701 INFO L226 Difference]: Without dead ends: 4171 [2022-04-05 04:13:52,701 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 04:13:52,702 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 138 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 105 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 04:13:52,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 105 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2022-04-05 04:13:52,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4169. [2022-04-05 04:13:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 4165 states have (on average 1.4300120048019207) internal successors, (5956), 4165 states have internal predecessors, (5956), 2 states have call successors, (2), 2 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 04:13:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 5959 transitions. [2022-04-05 04:13:52,765 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 5959 transitions. Word has length 29 [2022-04-05 04:13:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,765 INFO L478 AbstractCegarLoop]: Abstraction has 4169 states and 5959 transitions. [2022-04-05 04:13:52,765 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 04:13:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 5959 transitions. [2022-04-05 04:13:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:13:52,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,768 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 04:13:52,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-05 04:13:52,768 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,768 INFO L85 PathProgramCache]: Analyzing trace with hash 883367892, now seen corresponding path program 1 times [2022-04-05 04:13:52,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423460875] [2022-04-05 04:13:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,786 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 04:13:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423460875] [2022-04-05 04:13:52,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423460875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:52,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:52,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618797096] [2022-04-05 04:13:52,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:52,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:52,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:52,787 INFO L87 Difference]: Start difference. First operand 4169 states and 5959 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 04:13:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:52,850 INFO L93 Difference]: Finished difference Result 7179 states and 10312 transitions. [2022-04-05 04:13:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:52,850 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 04:13:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:52,861 INFO L225 Difference]: With dead ends: 7179 [2022-04-05 04:13:52,861 INFO L226 Difference]: Without dead ends: 7179 [2022-04-05 04:13:52,861 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 04:13:52,862 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:52,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-04-05 04:13:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6153. [2022-04-05 04:13:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6149 states have (on average 1.3849406407545943) internal successors, (8516), 6149 states have internal predecessors, (8516), 2 states have call successors, (2), 2 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 04:13:52,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8519 transitions. [2022-04-05 04:13:52,952 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8519 transitions. Word has length 29 [2022-04-05 04:13:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:52,952 INFO L478 AbstractCegarLoop]: Abstraction has 6153 states and 8519 transitions. [2022-04-05 04:13:52,953 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 04:13:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8519 transitions. [2022-04-05 04:13:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 04:13:52,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:52,959 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 04:13:52,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-05 04:13:52,959 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash 377809267, now seen corresponding path program 1 times [2022-04-05 04:13:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:52,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381079010] [2022-04-05 04:13:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:52,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:52,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381079010] [2022-04-05 04:13:52,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381079010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:52,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:52,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:52,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137058816] [2022-04-05 04:13:52,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:52,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:52,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:52,992 INFO L87 Difference]: Start difference. First operand 6153 states and 8519 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 04:13:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:53,058 INFO L93 Difference]: Finished difference Result 8075 states and 11016 transitions. [2022-04-05 04:13:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:53,058 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 04:13:53,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:53,070 INFO L225 Difference]: With dead ends: 8075 [2022-04-05 04:13:53,070 INFO L226 Difference]: Without dead ends: 8075 [2022-04-05 04:13:53,070 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 04:13:53,071 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:13:53,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 117 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2022-04-05 04:13:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8073. [2022-04-05 04:13:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8069 states have (on average 1.3647292105589293) internal successors, (11012), 8069 states have internal predecessors, (11012), 2 states have call successors, (2), 2 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 04:13:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 11015 transitions. [2022-04-05 04:13:53,170 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 11015 transitions. Word has length 29 [2022-04-05 04:13:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:53,170 INFO L478 AbstractCegarLoop]: Abstraction has 8073 states and 11015 transitions. [2022-04-05 04:13:53,170 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 04:13:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 11015 transitions. [2022-04-05 04:13:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:13:53,176 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:53,176 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 04:13:53,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-05 04:13:53,176 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1614633780, now seen corresponding path program 1 times [2022-04-05 04:13:53,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:53,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323572530] [2022-04-05 04:13:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:53,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:53,194 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 04:13:53,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323572530] [2022-04-05 04:13:53,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323572530] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:53,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:53,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:53,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089159775] [2022-04-05 04:13:53,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:53,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:53,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:53,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:53,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:53,195 INFO L87 Difference]: Start difference. First operand 8073 states and 11015 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 04:13:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:53,259 INFO L93 Difference]: Finished difference Result 8203 states and 11016 transitions. [2022-04-05 04:13:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:53,259 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 04:13:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:53,270 INFO L225 Difference]: With dead ends: 8203 [2022-04-05 04:13:53,270 INFO L226 Difference]: Without dead ends: 8203 [2022-04-05 04:13:53,270 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 04:13:53,271 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 102 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 04:13:53,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 102 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2022-04-05 04:13:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8201. [2022-04-05 04:13:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.3434183237769917) internal successors, (11012), 8197 states have internal predecessors, (11012), 2 states have call successors, (2), 2 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 04:13:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11015 transitions. [2022-04-05 04:13:53,379 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11015 transitions. Word has length 30 [2022-04-05 04:13:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:53,379 INFO L478 AbstractCegarLoop]: Abstraction has 8201 states and 11015 transitions. [2022-04-05 04:13:53,380 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 04:13:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11015 transitions. [2022-04-05 04:13:53,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:13:53,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:53,386 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 04:13:53,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-05 04:13:53,386 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1172781707, now seen corresponding path program 1 times [2022-04-05 04:13:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:53,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608522016] [2022-04-05 04:13:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:53,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:53,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:53,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:53,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608522016] [2022-04-05 04:13:53,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608522016] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:53,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:53,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:53,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470901348] [2022-04-05 04:13:53,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:53,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:53,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:53,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:53,405 INFO L87 Difference]: Start difference. First operand 8201 states and 11015 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 04:13:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:53,478 INFO L93 Difference]: Finished difference Result 13835 states and 18568 transitions. [2022-04-05 04:13:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:53,478 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 04:13:53,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:53,500 INFO L225 Difference]: With dead ends: 13835 [2022-04-05 04:13:53,500 INFO L226 Difference]: Without dead ends: 13835 [2022-04-05 04:13:53,500 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 04:13:53,501 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 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 04:13:53,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 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 04:13:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2022-04-05 04:13:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12297. [2022-04-05 04:13:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12297 states, 12293 states have (on average 1.3018791181973481) internal successors, (16004), 12293 states have internal predecessors, (16004), 2 states have call successors, (2), 2 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 04:13:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12297 states to 12297 states and 16007 transitions. [2022-04-05 04:13:53,676 INFO L78 Accepts]: Start accepts. Automaton has 12297 states and 16007 transitions. Word has length 30 [2022-04-05 04:13:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:53,676 INFO L478 AbstractCegarLoop]: Abstraction has 12297 states and 16007 transitions. [2022-04-05 04:13:53,678 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 04:13:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 12297 states and 16007 transitions. [2022-04-05 04:13:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:13:53,688 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:53,688 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 04:13:53,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-05 04:13:53,689 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:53,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1678340332, now seen corresponding path program 1 times [2022-04-05 04:13:53,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:53,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827986272] [2022-04-05 04:13:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:53,709 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 04:13:53,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:53,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827986272] [2022-04-05 04:13:53,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827986272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:53,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:53,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222427846] [2022-04-05 04:13:53,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:53,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:53,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:53,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:53,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:53,710 INFO L87 Difference]: Start difference. First operand 12297 states and 16007 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 04:13:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:53,792 INFO L93 Difference]: Finished difference Result 15883 states and 20232 transitions. [2022-04-05 04:13:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:53,793 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 04:13:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:53,819 INFO L225 Difference]: With dead ends: 15883 [2022-04-05 04:13:53,820 INFO L226 Difference]: Without dead ends: 15883 [2022-04-05 04:13:53,820 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 04:13:53,820 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 119 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 04:13:53,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 119 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2022-04-05 04:13:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15881. [2022-04-05 04:13:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15881 states, 15877 states have (on average 1.2740442149020597) internal successors, (20228), 15877 states have internal predecessors, (20228), 2 states have call successors, (2), 2 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 04:13:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 20231 transitions. [2022-04-05 04:13:54,124 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 20231 transitions. Word has length 30 [2022-04-05 04:13:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:54,124 INFO L478 AbstractCegarLoop]: Abstraction has 15881 states and 20231 transitions. [2022-04-05 04:13:54,124 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 04:13:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 20231 transitions. [2022-04-05 04:13:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 04:13:54,138 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:54,139 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, 1] [2022-04-05 04:13:54,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-05 04:13:54,139 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:54,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1996461521, now seen corresponding path program 1 times [2022-04-05 04:13:54,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:54,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657389361] [2022-04-05 04:13:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:54,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:54,159 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 04:13:54,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657389361] [2022-04-05 04:13:54,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657389361] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:54,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:54,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:54,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018881501] [2022-04-05 04:13:54,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:54,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:54,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:54,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:54,161 INFO L87 Difference]: Start difference. First operand 15881 states and 20231 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:54,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:54,257 INFO L93 Difference]: Finished difference Result 16139 states and 20232 transitions. [2022-04-05 04:13:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:54,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-05 04:13:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:54,280 INFO L225 Difference]: With dead ends: 16139 [2022-04-05 04:13:54,280 INFO L226 Difference]: Without dead ends: 16139 [2022-04-05 04:13:54,280 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 04:13:54,281 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 99 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 04:13:54,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2022-04-05 04:13:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16137. [2022-04-05 04:13:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16137 states, 16133 states have (on average 1.2538275584206284) internal successors, (20228), 16133 states have internal predecessors, (20228), 2 states have call successors, (2), 2 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 04:13:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 20231 transitions. [2022-04-05 04:13:54,524 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 20231 transitions. Word has length 31 [2022-04-05 04:13:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:54,524 INFO L478 AbstractCegarLoop]: Abstraction has 16137 states and 20231 transitions. [2022-04-05 04:13:54,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 20231 transitions. [2022-04-05 04:13:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 04:13:54,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:54,536 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, 1] [2022-04-05 04:13:54,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-05 04:13:54,536 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash -488909712, now seen corresponding path program 1 times [2022-04-05 04:13:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:54,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47130360] [2022-04-05 04:13:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:54,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:54,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:54,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47130360] [2022-04-05 04:13:54,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47130360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:54,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:54,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566155264] [2022-04-05 04:13:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:54,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:54,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:54,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:54,555 INFO L87 Difference]: Start difference. First operand 16137 states and 20231 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:54,657 INFO L93 Difference]: Finished difference Result 26635 states and 33032 transitions. [2022-04-05 04:13:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-05 04:13:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:54,704 INFO L225 Difference]: With dead ends: 26635 [2022-04-05 04:13:54,704 INFO L226 Difference]: Without dead ends: 26635 [2022-04-05 04:13:54,705 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 04:13:54,705 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 122 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 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 04:13:54,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 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 04:13:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26635 states. [2022-04-05 04:13:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26635 to 24585. [2022-04-05 04:13:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24585 states, 24581 states have (on average 1.2186648224238232) internal successors, (29956), 24581 states have internal predecessors, (29956), 2 states have call successors, (2), 2 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 04:13:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24585 states to 24585 states and 29959 transitions. [2022-04-05 04:13:55,206 INFO L78 Accepts]: Start accepts. Automaton has 24585 states and 29959 transitions. Word has length 31 [2022-04-05 04:13:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:55,206 INFO L478 AbstractCegarLoop]: Abstraction has 24585 states and 29959 transitions. [2022-04-05 04:13:55,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 24585 states and 29959 transitions. [2022-04-05 04:13:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 04:13:55,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:55,229 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, 1] [2022-04-05 04:13:55,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-05 04:13:55,230 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash -994468337, now seen corresponding path program 1 times [2022-04-05 04:13:55,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:55,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780443986] [2022-04-05 04:13:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:55,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:55,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:55,252 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 04:13:55,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:55,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780443986] [2022-04-05 04:13:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780443986] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:55,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:55,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152693566] [2022-04-05 04:13:55,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:55,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:55,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:55,254 INFO L87 Difference]: Start difference. First operand 24585 states and 29959 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:55,363 INFO L93 Difference]: Finished difference Result 31243 states and 36872 transitions. [2022-04-05 04:13:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-05 04:13:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:55,404 INFO L225 Difference]: With dead ends: 31243 [2022-04-05 04:13:55,404 INFO L226 Difference]: Without dead ends: 31243 [2022-04-05 04:13:55,405 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 04:13:55,405 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 121 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 04:13:55,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 121 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2022-04-05 04:13:55,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31241. [2022-04-05 04:13:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31241 states, 31237 states have (on average 1.1802669910682844) internal successors, (36868), 31237 states have internal predecessors, (36868), 2 states have call successors, (2), 2 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 04:13:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31241 states to 31241 states and 36871 transitions. [2022-04-05 04:13:55,971 INFO L78 Accepts]: Start accepts. Automaton has 31241 states and 36871 transitions. Word has length 31 [2022-04-05 04:13:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:55,971 INFO L478 AbstractCegarLoop]: Abstraction has 31241 states and 36871 transitions. [2022-04-05 04:13:55,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 31241 states and 36871 transitions. [2022-04-05 04:13:55,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 04:13:55,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:55,986 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, 1, 1] [2022-04-05 04:13:55,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-05 04:13:55,987 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2023701264, now seen corresponding path program 1 times [2022-04-05 04:13:55,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:55,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980611345] [2022-04-05 04:13:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:55,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:56,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980611345] [2022-04-05 04:13:56,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980611345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:56,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:56,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315707070] [2022-04-05 04:13:56,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:56,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:56,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:56,007 INFO L87 Difference]: Start difference. First operand 31241 states and 36871 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:56,107 INFO L93 Difference]: Finished difference Result 31755 states and 36872 transitions. [2022-04-05 04:13:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:56,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-05 04:13:56,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:56,145 INFO L225 Difference]: With dead ends: 31755 [2022-04-05 04:13:56,145 INFO L226 Difference]: Without dead ends: 31755 [2022-04-05 04:13:56,146 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 04:13:56,148 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 135 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 96 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 04:13:56,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 96 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31755 states. [2022-04-05 04:13:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31755 to 31753. [2022-04-05 04:13:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31753 states, 31749 states have (on average 1.1612334246747928) internal successors, (36868), 31749 states have internal predecessors, (36868), 2 states have call successors, (2), 2 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 04:13:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31753 states to 31753 states and 36871 transitions. [2022-04-05 04:13:56,663 INFO L78 Accepts]: Start accepts. Automaton has 31753 states and 36871 transitions. Word has length 32 [2022-04-05 04:13:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:56,668 INFO L478 AbstractCegarLoop]: Abstraction has 31753 states and 36871 transitions. [2022-04-05 04:13:56,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31753 states and 36871 transitions. [2022-04-05 04:13:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 04:13:56,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:56,685 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, 1, 1] [2022-04-05 04:13:56,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-05 04:13:56,685 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -763714223, now seen corresponding path program 1 times [2022-04-05 04:13:56,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:56,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276865348] [2022-04-05 04:13:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:56,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:56,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:56,710 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 04:13:56,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:56,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276865348] [2022-04-05 04:13:56,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276865348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:56,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:56,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:56,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304272084] [2022-04-05 04:13:56,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:56,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:56,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:56,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:56,712 INFO L87 Difference]: Start difference. First operand 31753 states and 36871 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:56,874 INFO L93 Difference]: Finished difference Result 51209 states and 57863 transitions. [2022-04-05 04:13:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:56,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-05 04:13:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:56,948 INFO L225 Difference]: With dead ends: 51209 [2022-04-05 04:13:56,948 INFO L226 Difference]: Without dead ends: 51209 [2022-04-05 04:13:56,949 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 04:13:56,949 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 73 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 04:13:56,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 73 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51209 states. [2022-04-05 04:13:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51209 to 49161. [2022-04-05 04:13:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49161 states, 49157 states have (on average 1.13538254978945) internal successors, (55812), 49157 states have internal predecessors, (55812), 2 states have call successors, (2), 2 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 04:13:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49161 states to 49161 states and 55815 transitions. [2022-04-05 04:13:57,577 INFO L78 Accepts]: Start accepts. Automaton has 49161 states and 55815 transitions. Word has length 32 [2022-04-05 04:13:57,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:57,577 INFO L478 AbstractCegarLoop]: Abstraction has 49161 states and 55815 transitions. [2022-04-05 04:13:57,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 49161 states and 55815 transitions. [2022-04-05 04:13:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 04:13:57,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:13:57,609 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, 1, 1] [2022-04-05 04:13:57,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-05 04:13:57,609 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:13:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:13:57,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1269272848, now seen corresponding path program 1 times [2022-04-05 04:13:57,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:13:57,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966420869] [2022-04-05 04:13:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:13:57,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:13:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:13:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:13:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:13:57,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:13:57,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966420869] [2022-04-05 04:13:57,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966420869] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:13:57,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:13:57,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:13:57,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56431666] [2022-04-05 04:13:57,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:13:57,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:13:57,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:13:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:13:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:13:57,633 INFO L87 Difference]: Start difference. First operand 49161 states and 55815 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:13:57,787 INFO L93 Difference]: Finished difference Result 61447 states and 66566 transitions. [2022-04-05 04:13:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:13:57,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-05 04:13:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:13:57,787 INFO L225 Difference]: With dead ends: 61447 [2022-04-05 04:13:57,787 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 04:13:57,787 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 04:13:57,788 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 122 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 04:13:57,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 122 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:13:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 04:13:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 04:13:57,789 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 04:13:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 04:13:57,789 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2022-04-05 04:13:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:13:57,789 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 04:13:57,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:13:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 04:13:57,789 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 04:13:57,791 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 04:13:57,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-05 04:13:57,794 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, 1, 1] [2022-04-05 04:13:57,795 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 04:13:57,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:13:57 BasicIcfg [2022-04-05 04:13:57,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 04:13:57,800 INFO L158 Benchmark]: Toolchain (without parser) took 8795.57ms. Allocated memory was 165.7MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 115.6MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 554.0MB. Max. memory is 8.0GB. [2022-04-05 04:13:57,801 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 165.7MB. Free memory was 132.3MB in the beginning and 132.2MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 04:13:57,801 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.48ms. Allocated memory is still 165.7MB. Free memory was 115.5MB in the beginning and 141.8MB in the end (delta: -26.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 04:13:57,801 INFO L158 Benchmark]: Boogie Preprocessor took 32.36ms. Allocated memory is still 165.7MB. Free memory was 141.8MB in the beginning and 140.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 04:13:57,802 INFO L158 Benchmark]: RCFGBuilder took 369.61ms. Allocated memory is still 165.7MB. Free memory was 140.2MB in the beginning and 127.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-05 04:13:57,803 INFO L158 Benchmark]: IcfgTransformer took 23.96ms. Allocated memory is still 165.7MB. Free memory was 127.2MB in the beginning and 126.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 04:13:57,806 INFO L158 Benchmark]: TraceAbstraction took 8116.20ms. Allocated memory was 165.7MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 125.2MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 564.5MB. Max. memory is 8.0GB. [2022-04-05 04:13:57,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 165.7MB. Free memory was 132.3MB in the beginning and 132.2MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 245.48ms. Allocated memory is still 165.7MB. Free memory was 115.5MB in the beginning and 141.8MB in the end (delta: -26.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.36ms. Allocated memory is still 165.7MB. Free memory was 141.8MB in the beginning and 140.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 369.61ms. Allocated memory is still 165.7MB. Free memory was 140.2MB in the beginning and 127.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 23.96ms. Allocated memory is still 165.7MB. Free memory was 127.2MB in the beginning and 126.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 8116.20ms. Allocated memory was 165.7MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 125.2MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 564.5MB. 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: 177]: 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, 48 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 31, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4339 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4339 mSDsluCounter, 3131 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 219 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2036 IncrementalHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 2912 mSDtfsCounter, 2036 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 217 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49161occurred in iteration=30, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 843 NumberOfCodeBlocks, 843 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 812 ConstructedInterpolants, 0 QuantifiedInterpolants, 1801 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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 04:13:57,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...