/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/loops-crafted-1/mono-crafted_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:19:40,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:19:40,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:19:40,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 21:19:40,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:19:40,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:19:40,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:19:40,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:19:40,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:19:40,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:19:40,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:19:40,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:19:40,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:19:40,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:19:40,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:19:40,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:19:40,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:19:40,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:19:40,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:19:40,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:19:40,899 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:19:40,906 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:19:40,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:19:40,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:19:40,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:19:40,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:19:40,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:19:40,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:19:40,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:19:40,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:19:40,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:19:40,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:19:40,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:19:40,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:19:40,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:19:40,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:19:40,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:19:40,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:19:40,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:19:40,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:19:40,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:19:40,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:19:40,911 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:19:40,912 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:19:41,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:19:41,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:19:41,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:19:41,089 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:19:41,089 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:19:41,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2022-02-14 21:19:41,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d4a353ce/a8a2df1a5faa4169b20de9897289cf45/FLAG1fead6839 [2022-02-14 21:19:41,469 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:19:41,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2022-02-14 21:19:41,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d4a353ce/a8a2df1a5faa4169b20de9897289cf45/FLAG1fead6839 [2022-02-14 21:19:41,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d4a353ce/a8a2df1a5faa4169b20de9897289cf45 [2022-02-14 21:19:41,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:19:41,932 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:19:41,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:19:41,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:19:41,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:19:41,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:19:41" (1/1) ... [2022-02-14 21:19:41,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109aaa56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:41, skipping insertion in model container [2022-02-14 21:19:41,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:19:41" (1/1) ... [2022-02-14 21:19:41,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:19:41,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:19:42,028 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c[319,332] [2022-02-14 21:19:42,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:19:42,063 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:19:42,072 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c[319,332] [2022-02-14 21:19:42,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:19:42,082 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:19:42,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42 WrapperNode [2022-02-14 21:19:42,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:19:42,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:19:42,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:19:42,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:19:42,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:19:42,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:19:42,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:19:42,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:19:42,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:19:42,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:19:42,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 21:19:42,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 21:19:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:19:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:19:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:19:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:19:42,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:19:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:19:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:19:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:19:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:19:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:19:42,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:19:42,227 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:19:42,228 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:19:42,294 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:19:42,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:19:42,297 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 21:19:42,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:19:42 BoogieIcfgContainer [2022-02-14 21:19:42,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:19:42,299 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:19:42,299 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:19:42,300 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:19:42,302 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:19:42" (1/1) ... [2022-02-14 21:19:42,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:19:42 BasicIcfg [2022-02-14 21:19:42,310 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:19:42,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:19:42,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:19:42,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:19:42,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:19:41" (1/4) ... [2022-02-14 21:19:42,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e37ded0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:19:42, skipping insertion in model container [2022-02-14 21:19:42,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:19:42" (2/4) ... [2022-02-14 21:19:42,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e37ded0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:19:42, skipping insertion in model container [2022-02-14 21:19:42,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:19:42" (3/4) ... [2022-02-14 21:19:42,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e37ded0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:19:42, skipping insertion in model container [2022-02-14 21:19:42,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:19:42" (4/4) ... [2022-02-14 21:19:42,315 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_11.cJordan [2022-02-14 21:19:42,318 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:19:42,318 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:19:42,343 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:19:42,348 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 21:19:42,348 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:19:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:19:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:19:42,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:19:42,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:19:42,360 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:19:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:19:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-02-14 21:19:42,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:19:42,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727750565] [2022-02-14 21:19:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:42,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:19:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:42,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:19:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:42,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:19:42,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727750565] [2022-02-14 21:19:42,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727750565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:19:42,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:19:42,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 21:19:42,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912737111] [2022-02-14 21:19:42,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:19:42,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 21:19:42,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:19:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 21:19:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:19:42,480 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:19:42,505 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-02-14 21:19:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 21:19:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-14 21:19:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:19:42,510 INFO L225 Difference]: With dead ends: 20 [2022-02-14 21:19:42,510 INFO L226 Difference]: Without dead ends: 13 [2022-02-14 21:19:42,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:19:42,514 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:19:42,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:19:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-02-14 21:19:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-02-14 21:19:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-02-14 21:19:42,532 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-02-14 21:19:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:19:42,533 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-02-14 21:19:42,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-02-14 21:19:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:19:42,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:19:42,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:19:42,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:19:42,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:19:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:19:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-02-14 21:19:42,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:19:42,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185860347] [2022-02-14 21:19:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:42,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:19:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:42,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:19:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:42,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:19:42,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185860347] [2022-02-14 21:19:42,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185860347] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:19:42,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:19:42,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:19:42,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548761744] [2022-02-14 21:19:42,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:19:42,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:19:42,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:19:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:19:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:19:42,597 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:19:42,640 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-02-14 21:19:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:19:42,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-14 21:19:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:19:42,641 INFO L225 Difference]: With dead ends: 15 [2022-02-14 21:19:42,642 INFO L226 Difference]: Without dead ends: 15 [2022-02-14 21:19:42,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:19:42,643 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:19:42,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:19:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-14 21:19:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-14 21:19:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-02-14 21:19:42,647 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-02-14 21:19:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:19:42,647 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-02-14 21:19:42,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-02-14 21:19:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 21:19:42,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:19:42,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:19:42,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 21:19:42,648 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:19:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:19:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash -521762940, now seen corresponding path program 1 times [2022-02-14 21:19:42,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:19:42,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087497726] [2022-02-14 21:19:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:42,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:19:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:42,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:19:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:42,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:19:42,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087497726] [2022-02-14 21:19:42,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087497726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:19:42,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064103334] [2022-02-14 21:19:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:42,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:42,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:19:42,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:19:42,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 21:19:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:42,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 21:19:42,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:19:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:42,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:19:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:42,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064103334] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:19:42,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:19:42,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-14 21:19:42,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772505843] [2022-02-14 21:19:42,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:19:42,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 21:19:42,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:19:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 21:19:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-14 21:19:42,925 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:19:43,047 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-02-14 21:19:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 21:19:43,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-14 21:19:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:19:43,049 INFO L225 Difference]: With dead ends: 19 [2022-02-14 21:19:43,049 INFO L226 Difference]: Without dead ends: 19 [2022-02-14 21:19:43,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-02-14 21:19:43,054 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:19:43,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:19:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-14 21:19:43,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-02-14 21:19:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-02-14 21:19:43,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-02-14 21:19:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:19:43,064 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-02-14 21:19:43,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-02-14 21:19:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 21:19:43,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:19:43,065 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:19:43,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 21:19:43,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:43,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:19:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:19:43,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1609511199, now seen corresponding path program 1 times [2022-02-14 21:19:43,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:19:43,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302688459] [2022-02-14 21:19:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:43,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:19:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:43,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:19:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:43,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:19:43,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302688459] [2022-02-14 21:19:43,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302688459] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:19:43,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547333396] [2022-02-14 21:19:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:43,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:43,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:19:43,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:19:43,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 21:19:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 21:19:43,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:19:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:43,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:19:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 21:19:43,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547333396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:19:43,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:19:43,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 12 [2022-02-14 21:19:43,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252381102] [2022-02-14 21:19:43,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:19:43,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 21:19:43,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:19:43,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 21:19:43,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-14 21:19:43,763 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:19:43,909 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-02-14 21:19:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 21:19:43,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-14 21:19:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:19:43,910 INFO L225 Difference]: With dead ends: 26 [2022-02-14 21:19:43,910 INFO L226 Difference]: Without dead ends: 23 [2022-02-14 21:19:43,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-14 21:19:43,911 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:19:43,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 53 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:19:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-14 21:19:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-02-14 21:19:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-02-14 21:19:43,924 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-02-14 21:19:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:19:43,925 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-02-14 21:19:43,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-02-14 21:19:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-14 21:19:43,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:19:43,926 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:19:43,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 21:19:44,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 21:19:44,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:19:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:19:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash -251734435, now seen corresponding path program 2 times [2022-02-14 21:19:44,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:19:44,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328521185] [2022-02-14 21:19:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:44,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:19:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:44,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:19:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:44,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:19:44,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328521185] [2022-02-14 21:19:44,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328521185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:19:44,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085918622] [2022-02-14 21:19:44,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:19:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:19:44,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:19:44,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 21:19:44,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:19:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:19:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 21:19:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:19:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:44,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:19:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:19:44,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085918622] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:19:44,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:19:44,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-14 21:19:44,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666729824] [2022-02-14 21:19:44,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:19:44,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 21:19:44,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:19:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 21:19:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-02-14 21:19:44,446 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:19:44,655 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-02-14 21:19:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 21:19:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-14 21:19:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:19:44,657 INFO L225 Difference]: With dead ends: 33 [2022-02-14 21:19:44,657 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 21:19:44,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2022-02-14 21:19:44,658 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:19:44,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:19:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 21:19:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-02-14 21:19:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-02-14 21:19:44,661 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2022-02-14 21:19:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:19:44,661 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-02-14 21:19:44,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-02-14 21:19:44,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-14 21:19:44,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:19:44,662 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:19:44,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 21:19:44,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:44,872 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:19:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:19:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash -151822765, now seen corresponding path program 3 times [2022-02-14 21:19:44,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:19:44,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735855333] [2022-02-14 21:19:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:44,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:19:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:44,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:19:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 21:19:44,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:19:44,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735855333] [2022-02-14 21:19:44,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735855333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:19:44,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192303504] [2022-02-14 21:19:44,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:19:44,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:44,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:19:44,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:19:44,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 21:19:45,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-14 21:19:45,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:19:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 21:19:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:19:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-02-14 21:19:45,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:19:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-02-14 21:19:45,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192303504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:19:45,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:19:45,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 7] total 18 [2022-02-14 21:19:45,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497946762] [2022-02-14 21:19:45,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:19:45,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 21:19:45,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:19:45,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 21:19:45,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-02-14 21:19:45,574 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:19:47,226 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-02-14 21:19:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 21:19:47,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-14 21:19:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:19:47,228 INFO L225 Difference]: With dead ends: 61 [2022-02-14 21:19:47,228 INFO L226 Difference]: Without dead ends: 61 [2022-02-14 21:19:47,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-02-14 21:19:47,229 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 21:19:47,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 58 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 21:19:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-14 21:19:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-02-14 21:19:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-02-14 21:19:47,233 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 27 [2022-02-14 21:19:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:19:47,233 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-02-14 21:19:47,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-02-14 21:19:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-14 21:19:47,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:19:47,234 INFO L514 BasicCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:19:47,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-14 21:19:47,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:47,438 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:19:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:19:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1469545376, now seen corresponding path program 4 times [2022-02-14 21:19:47,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:19:47,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532307289] [2022-02-14 21:19:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:47,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:19:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:47,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:19:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-02-14 21:19:47,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:19:47,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532307289] [2022-02-14 21:19:47,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532307289] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:19:47,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491503898] [2022-02-14 21:19:47,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 21:19:47,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:47,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:19:47,572 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:19:47,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 21:19:47,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 21:19:47,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:19:47,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 21:19:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:19:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-02-14 21:19:47,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:19:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-02-14 21:19:47,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491503898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:19:47,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:19:47,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 21 [2022-02-14 21:19:47,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249179182] [2022-02-14 21:19:47,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:19:47,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-14 21:19:47,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:19:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-14 21:19:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-02-14 21:19:47,963 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:19:50,196 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-02-14 21:19:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-14 21:19:50,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-14 21:19:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:19:50,197 INFO L225 Difference]: With dead ends: 70 [2022-02-14 21:19:50,197 INFO L226 Difference]: Without dead ends: 70 [2022-02-14 21:19:50,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=421, Invalid=985, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 21:19:50,198 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:19:50,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:19:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-14 21:19:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-14 21:19:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.123076923076923) internal successors, (73), 65 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-02-14 21:19:50,203 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 41 [2022-02-14 21:19:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:19:50,203 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-02-14 21:19:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:19:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-02-14 21:19:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-14 21:19:50,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:19:50,204 INFO L514 BasicCegarLoop]: trace histogram [25, 17, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:19:50,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 21:19:50,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:50,409 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:19:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:19:50,409 INFO L85 PathProgramCache]: Analyzing trace with hash 249795404, now seen corresponding path program 5 times [2022-02-14 21:19:50,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:19:50,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167486036] [2022-02-14 21:19:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:19:50,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:19:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:50,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:19:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:19:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 270 proven. 306 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-02-14 21:19:50,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:19:50,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167486036] [2022-02-14 21:19:50,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167486036] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:19:50,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239619753] [2022-02-14 21:19:50,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 21:19:50,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:19:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:19:50,786 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:19:50,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 21:19:52,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-02-14 21:19:52,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:19:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-14 21:19:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:19:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 21:19:53,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:19:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 21:19:54,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239619753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:19:54,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:19:54,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 24] total 47 [2022-02-14 21:19:54,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910396194] [2022-02-14 21:19:54,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:19:54,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-14 21:19:54,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:19:54,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-14 21:19:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=1568, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 21:19:54,124 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:28,352 WARN L228 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 156 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:21:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:28,397 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2022-02-14 21:21:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-14 21:21:28,398 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-14 21:21:28,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:28,398 INFO L225 Difference]: With dead ends: 116 [2022-02-14 21:21:28,398 INFO L226 Difference]: Without dead ends: 116 [2022-02-14 21:21:28,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 94.8s TimeCoverageRelationStatistics Valid=2023, Invalid=5455, Unknown=4, NotChecked=0, Total=7482 [2022-02-14 21:21:28,401 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:28,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 129 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 21:21:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-14 21:21:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-02-14 21:21:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.072072072072072) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2022-02-14 21:21:28,406 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 61 [2022-02-14 21:21:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:28,406 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2022-02-14 21:21:28,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2022-02-14 21:21:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 21:21:28,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:28,407 INFO L514 BasicCegarLoop]: trace histogram [47, 39, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:28,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 21:21:28,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:28,615 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:28,615 INFO L85 PathProgramCache]: Analyzing trace with hash -371956704, now seen corresponding path program 6 times [2022-02-14 21:21:28,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:28,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317804790] [2022-02-14 21:21:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:28,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:29,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 600 proven. 1560 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-02-14 21:21:29,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:29,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317804790] [2022-02-14 21:21:29,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317804790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:29,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817173716] [2022-02-14 21:21:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 21:21:29,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:29,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:21:29,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 21:21:31,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2022-02-14 21:21:31,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:21:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-14 21:21:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 663 proven. 64 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-02-14 21:21:32,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 663 proven. 64 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-02-14 21:21:33,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817173716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:33,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:33,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 11, 15] total 65 [2022-02-14 21:21:33,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742872942] [2022-02-14 21:21:33,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:33,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-14 21:21:33,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-14 21:21:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=935, Invalid=3225, Unknown=0, NotChecked=0, Total=4160 [2022-02-14 21:21:33,931 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 65 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:41,675 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2022-02-14 21:21:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-14 21:21:41,675 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-02-14 21:21:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:41,676 INFO L225 Difference]: With dead ends: 133 [2022-02-14 21:21:41,676 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 21:21:41,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2162, Invalid=11644, Unknown=0, NotChecked=0, Total=13806 [2022-02-14 21:21:41,679 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 166 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:41,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 79 Invalid, 3474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-14 21:21:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 21:21:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 21:21:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-14 21:21:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 21:21:41,679 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2022-02-14 21:21:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:41,680 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 21:21:41,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.046875) internal successors, (131), 63 states have internal predecessors, (131), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 21:21:41,680 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 21:21:41,682 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 21:21:41,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 21:21:41,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:41,889 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2022-02-14 21:21:41,890 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 21:21:41,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:21:41 BasicIcfg [2022-02-14 21:21:41,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 21:21:41,894 INFO L158 Benchmark]: Toolchain (without parser) took 119961.51ms. Allocated memory was 239.1MB in the beginning and 287.3MB in the end (delta: 48.2MB). Free memory was 190.8MB in the beginning and 238.3MB in the end (delta: -47.5MB). Peak memory consumption was 1.6MB. Max. memory is 8.0GB. [2022-02-14 21:21:41,894 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 239.1MB. Free memory is still 206.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 21:21:41,895 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.41ms. Allocated memory is still 239.1MB. Free memory was 190.5MB in the beginning and 216.8MB in the end (delta: -26.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-14 21:21:41,895 INFO L158 Benchmark]: Boogie Preprocessor took 28.69ms. Allocated memory is still 239.1MB. Free memory was 216.8MB in the beginning and 215.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 21:21:41,895 INFO L158 Benchmark]: RCFGBuilder took 185.74ms. Allocated memory is still 239.1MB. Free memory was 215.0MB in the beginning and 204.7MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-14 21:21:41,895 INFO L158 Benchmark]: IcfgTransformer took 11.06ms. Allocated memory is still 239.1MB. Free memory was 204.7MB in the beginning and 203.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 21:21:41,895 INFO L158 Benchmark]: TraceAbstraction took 119582.50ms. Allocated memory was 239.1MB in the beginning and 287.3MB in the end (delta: 48.2MB). Free memory was 203.2MB in the beginning and 238.3MB in the end (delta: -35.1MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-02-14 21:21:41,897 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 239.1MB. Free memory is still 206.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 149.41ms. Allocated memory is still 239.1MB. Free memory was 190.5MB in the beginning and 216.8MB in the end (delta: -26.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.69ms. Allocated memory is still 239.1MB. Free memory was 216.8MB in the beginning and 215.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 185.74ms. Allocated memory is still 239.1MB. Free memory was 215.0MB in the beginning and 204.7MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 11.06ms. Allocated memory is still 239.1MB. Free memory was 204.7MB in the beginning and 203.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 119582.50ms. Allocated memory was 239.1MB in the beginning and 287.3MB in the end (delta: 48.2MB). Free memory was 203.2MB in the beginning and 238.3MB in the end (delta: -35.1MB). Peak memory consumption was 14.7MB. 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: 4]: 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 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 119.5s, OverallIterations: 9, TraceHistogramMax: 47, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 106.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 408 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 407 mSDsluCounter, 486 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 379 mSDsCounter, 947 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4523 IncrementalHoareTripleChecker+Invalid, 5470 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 947 mSolverCounterUnsat, 107 mSDtfsCounter, 4523 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 846 GetRequests, 515 SyntacticMatches, 12 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 108.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=8, InterpolantAutomatonStates: 172, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 588 NumberOfCodeBlocks, 560 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 848 ConstructedInterpolants, 0 QuantifiedInterpolants, 3842 SizeOfPredicates, 6 NumberOfNonLiveVariables, 713 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 6330/9447 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 21:21:41,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...