/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:04:34,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:04:34,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:04:34,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:04:34,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:04:34,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:04:34,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:04:34,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:04:34,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:04:34,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:04:34,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:04:34,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:04:34,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:04:34,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:04:34,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:04:34,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:04:34,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:04:34,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:04:34,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:04:34,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:04:34,627 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:04:34,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:04:34,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:04:34,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:04:34,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:04:34,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 20:04:34,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:04:34,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:04:34,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:04:34,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:04:34,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:04:34,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:04:34,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:04:34,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:04:34,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:04:34,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:04:34,661 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:04:34,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:04:34,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:04:34,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:04:34,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:04:34,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:04:34,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:04:34,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:04:34,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:04:34,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:04:34,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:04:34,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:04:34,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:04:34,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:04:34,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:04:34,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:04:34,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:04:34,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:04:34,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:04:34,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:04:34,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:04:34,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:04:34,666 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:04:34,666 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:04:34,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:04:34,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:04:34,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:04:34,879 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:04:34,880 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:04:34,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2022-03-17 20:04:34,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/396adb03f/4ce8df9820e24414877f15d002ec44e6/FLAGb55025bc6 [2022-03-17 20:04:35,345 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:04:35,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2022-03-17 20:04:35,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/396adb03f/4ce8df9820e24414877f15d002ec44e6/FLAGb55025bc6 [2022-03-17 20:04:35,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/396adb03f/4ce8df9820e24414877f15d002ec44e6 [2022-03-17 20:04:35,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:04:35,770 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:04:35,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:04:35,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:04:35,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:04:35,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf6d154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35, skipping insertion in model container [2022-03-17 20:04:35,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:04:35,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:04:35,929 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] [2022-03-17 20:04:35,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:04:35,943 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:04:35,952 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] [2022-03-17 20:04:35,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:04:35,966 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:04:35,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35 WrapperNode [2022-03-17 20:04:35,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:04:35,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:04:35,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:04:35,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:04:35,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:04:35,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:04:35,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:04:35,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:04:35,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (1/1) ... [2022-03-17 20:04:35,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:04:36,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:04:36,024 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) [2022-03-17 20:04:36,045 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 [2022-03-17 20:04:36,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:04:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:04:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:04:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:04:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:04:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:04:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:04:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:04:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:04:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:04:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:04:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:04:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:04:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:04:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:04:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:04:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:04:36,124 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:04:36,125 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:04:36,243 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:04:36,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:04:36,248 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 20:04:36,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:04:36 BoogieIcfgContainer [2022-03-17 20:04:36,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:04:36,263 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:04:36,264 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:04:36,265 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:04:36,267 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:04:36" (1/1) ... [2022-03-17 20:04:36,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:04:36 BasicIcfg [2022-03-17 20:04:36,279 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:04:36,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:04:36,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:04:36,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:04:36,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:04:35" (1/4) ... [2022-03-17 20:04:36,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e1c68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:04:36, skipping insertion in model container [2022-03-17 20:04:36,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:04:35" (2/4) ... [2022-03-17 20:04:36,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e1c68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:04:36, skipping insertion in model container [2022-03-17 20:04:36,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:04:36" (3/4) ... [2022-03-17 20:04:36,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e1c68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:04:36, skipping insertion in model container [2022-03-17 20:04:36,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:04:36" (4/4) ... [2022-03-17 20:04:36,300 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_11.cqvasr [2022-03-17 20:04:36,304 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:04:36,304 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:04:36,374 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:04:36,380 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 20:04:36,380 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:04:36,406 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) [2022-03-17 20:04:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 20:04:36,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:04:36,427 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:04:36,429 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:04:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:04:36,434 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-03-17 20:04:36,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:04:36,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061668875] [2022-03-17 20:04:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:36,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:04:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:36,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:04:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:04:36,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061668875] [2022-03-17 20:04:36,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061668875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:04:36,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:04:36,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:04:36,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500321507] [2022-03-17 20:04:36,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:04:36,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:04:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:04:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:04:36,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:04:36,644 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) [2022-03-17 20:04:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:04:36,685 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-17 20:04:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:04:36,688 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 [2022-03-17 20:04:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:04:36,694 INFO L225 Difference]: With dead ends: 32 [2022-03-17 20:04:36,695 INFO L226 Difference]: Without dead ends: 13 [2022-03-17 20:04:36,697 INFO L911 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 [2022-03-17 20:04:36,701 INFO L912 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 [2022-03-17 20:04:36,702 INFO L913 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] [2022-03-17 20:04:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-17 20:04:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-17 20:04:36,740 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) [2022-03-17 20:04:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-17 20:04:36,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-17 20:04:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:04:36,742 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-17 20:04:36,742 INFO L479 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) [2022-03-17 20:04:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-17 20:04:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 20:04:36,743 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:04:36,743 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:04:36,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:04:36,744 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:04:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:04:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-03-17 20:04:36,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:04:36,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956046734] [2022-03-17 20:04:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:04:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:04:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:36,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:04:36,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956046734] [2022-03-17 20:04:36,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956046734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:04:36,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:04:36,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:04:36,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144364584] [2022-03-17 20:04:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:04:36,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 20:04:36,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:04:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 20:04:36,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:04:36,902 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) [2022-03-17 20:04:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:04:36,948 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-17 20:04:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 20:04:36,949 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 [2022-03-17 20:04:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:04:36,950 INFO L225 Difference]: With dead ends: 22 [2022-03-17 20:04:36,950 INFO L226 Difference]: Without dead ends: 15 [2022-03-17 20:04:36,954 INFO L911 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 [2022-03-17 20:04:36,955 INFO L912 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 [2022-03-17 20:04:36,956 INFO L913 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] [2022-03-17 20:04:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-17 20:04:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-17 20:04:36,962 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) [2022-03-17 20:04:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-17 20:04:36,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-17 20:04:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:04:36,967 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-17 20:04:36,969 INFO L479 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) [2022-03-17 20:04:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-17 20:04:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 20:04:36,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:04:36,970 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:04:36,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 20:04:36,970 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:04:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:04:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash -521762940, now seen corresponding path program 1 times [2022-03-17 20:04:36,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:04:36,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904459187] [2022-03-17 20:04:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:36,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:04:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:37,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:04:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:37,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:04:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904459187] [2022-03-17 20:04:37,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904459187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:04:37,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749295503] [2022-03-17 20:04:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:37,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:04:37,076 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) [2022-03-17 20:04:37,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:04:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 20:04:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:04:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:37,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:04:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:37,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749295503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:04:37,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:04:37,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 20:04:37,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59409585] [2022-03-17 20:04:37,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:04:37,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:04:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:04:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:04:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:04:37,273 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) [2022-03-17 20:04:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:04:37,367 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-03-17 20:04:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:04:37,368 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 [2022-03-17 20:04:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:04:37,369 INFO L225 Difference]: With dead ends: 26 [2022-03-17 20:04:37,369 INFO L226 Difference]: Without dead ends: 19 [2022-03-17 20:04:37,370 INFO L911 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 [2022-03-17 20:04:37,373 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:04:37,374 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:04:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-17 20:04:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-03-17 20:04:37,379 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) [2022-03-17 20:04:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-17 20:04:37,380 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-03-17 20:04:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:04:37,381 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-17 20:04:37,381 INFO L479 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) [2022-03-17 20:04:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-17 20:04:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:04:37,382 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:04:37,382 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:04:37,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 20:04:37,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:37,596 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:04:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:04:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1609511199, now seen corresponding path program 1 times [2022-03-17 20:04:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:04:37,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637065945] [2022-03-17 20:04:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:37,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:04:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:37,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:04:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:04:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637065945] [2022-03-17 20:04:37,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637065945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:04:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282395821] [2022-03-17 20:04:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:37,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:04:37,684 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) [2022-03-17 20:04:37,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:04:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:37,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 20:04:37,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:04:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:37,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:04:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:04:37,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282395821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:04:37,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:04:37,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 12 [2022-03-17 20:04:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352960615] [2022-03-17 20:04:37,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:04:37,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 20:04:37,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:04:37,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 20:04:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-17 20:04:37,922 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) [2022-03-17 20:04:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:04:38,120 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-03-17 20:04:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 20:04:38,121 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 [2022-03-17 20:04:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:04:38,121 INFO L225 Difference]: With dead ends: 34 [2022-03-17 20:04:38,121 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 20:04:38,122 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-17 20:04:38,123 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:04:38,123 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:04:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 20:04:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-03-17 20:04:38,127 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) [2022-03-17 20:04:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-03-17 20:04:38,127 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-03-17 20:04:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:04:38,127 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-03-17 20:04:38,128 INFO L479 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) [2022-03-17 20:04:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-03-17 20:04:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-17 20:04:38,128 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:04:38,128 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:04:38,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 20:04:38,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 20:04:38,329 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:04:38,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:04:38,330 INFO L85 PathProgramCache]: Analyzing trace with hash -251734435, now seen corresponding path program 2 times [2022-03-17 20:04:38,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:04:38,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642376036] [2022-03-17 20:04:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:38,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:04:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:38,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:04:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:38,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:04:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642376036] [2022-03-17 20:04:38,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642376036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:04:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900970245] [2022-03-17 20:04:38,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:04:38,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:38,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:04:38,429 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) [2022-03-17 20:04:38,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:04:38,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:04:38,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:04:38,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 20:04:38,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:04:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:38,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:04:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:04:38,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900970245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:04:38,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:04:38,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-17 20:04:38,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260864280] [2022-03-17 20:04:38,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:04:38,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 20:04:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:04:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 20:04:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:04:38,680 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) [2022-03-17 20:04:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:04:39,063 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-03-17 20:04:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 20:04:39,064 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 [2022-03-17 20:04:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:04:39,066 INFO L225 Difference]: With dead ends: 43 [2022-03-17 20:04:39,066 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 20:04:39,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2022-03-17 20:04:39,067 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:04:39,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 48 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:04:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 20:04:39,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-03-17 20:04:39,073 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) [2022-03-17 20:04:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-03-17 20:04:39,074 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2022-03-17 20:04:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:04:39,074 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-03-17 20:04:39,074 INFO L479 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) [2022-03-17 20:04:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-03-17 20:04:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 20:04:39,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:04:39,079 INFO L500 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:04:39,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:04:39,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:39,283 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:04:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:04:39,284 INFO L85 PathProgramCache]: Analyzing trace with hash -151822765, now seen corresponding path program 3 times [2022-03-17 20:04:39,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:04:39,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000225270] [2022-03-17 20:04:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:04:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:39,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:04:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:04:39,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:04:39,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000225270] [2022-03-17 20:04:39,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000225270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:04:39,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367387689] [2022-03-17 20:04:39,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:04:39,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:39,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:04:39,442 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) [2022-03-17 20:04:39,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:04:39,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-17 20:04:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:04:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 20:04:39,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:04:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-17 20:04:39,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:04:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-17 20:04:40,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367387689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:04:40,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:04:40,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 7] total 18 [2022-03-17 20:04:40,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635509792] [2022-03-17 20:04:40,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:04:40,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 20:04:40,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:04:40,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 20:04:40,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-03-17 20:04:40,021 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) [2022-03-17 20:04:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:04:41,275 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2022-03-17 20:04:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 20:04:41,276 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 [2022-03-17 20:04:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:04:41,276 INFO L225 Difference]: With dead ends: 75 [2022-03-17 20:04:41,277 INFO L226 Difference]: Without dead ends: 61 [2022-03-17 20:04:41,277 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 20:04:41,278 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 20:04:41,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 20:04:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-17 20:04:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-03-17 20:04:41,288 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) [2022-03-17 20:04:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-03-17 20:04:41,289 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 27 [2022-03-17 20:04:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:04:41,290 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-03-17 20:04:41,290 INFO L479 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) [2022-03-17 20:04:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-03-17 20:04:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 20:04:41,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:04:41,291 INFO L500 BasicCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:04:41,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 20:04:41,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:41,495 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:04:41,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:04:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1469545376, now seen corresponding path program 4 times [2022-03-17 20:04:41,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:04:41,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958119400] [2022-03-17 20:04:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:41,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:04:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:04:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-17 20:04:41,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:04:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958119400] [2022-03-17 20:04:41,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958119400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:04:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239601847] [2022-03-17 20:04:41,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 20:04:41,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:41,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:04:41,669 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) [2022-03-17 20:04:41,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:04:41,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 20:04:41,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:04:41,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 20:04:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:04:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-17 20:04:41,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:04:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-17 20:04:42,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239601847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:04:42,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:04:42,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 21 [2022-03-17 20:04:42,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115080782] [2022-03-17 20:04:42,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:04:42,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 20:04:42,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:04:42,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 20:04:42,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-03-17 20:04:42,185 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) [2022-03-17 20:04:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:04:44,738 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2022-03-17 20:04:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-17 20:04:44,739 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 [2022-03-17 20:04:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:04:44,740 INFO L225 Difference]: With dead ends: 102 [2022-03-17 20:04:44,740 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 20:04:44,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=421, Invalid=985, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 20:04:44,742 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:04:44,742 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 64 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:04:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 20:04:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-17 20:04:44,756 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) [2022-03-17 20:04:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-03-17 20:04:44,760 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 41 [2022-03-17 20:04:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:04:44,761 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-03-17 20:04:44,761 INFO L479 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) [2022-03-17 20:04:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-03-17 20:04:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 20:04:44,764 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:04:44,764 INFO L500 BasicCegarLoop]: trace histogram [25, 17, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:04:44,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:04:44,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:44,984 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:04:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:04:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash 249795404, now seen corresponding path program 5 times [2022-03-17 20:04:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:04:44,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765054893] [2022-03-17 20:04:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:04:44,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:04:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:45,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:04:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:04:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 270 proven. 306 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-17 20:04:45,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:04:45,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765054893] [2022-03-17 20:04:45,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765054893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:04:45,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680586521] [2022-03-17 20:04:45,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 20:04:45,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:04:45,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:04:45,400 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) [2022-03-17 20:04:45,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:04:47,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-03-17 20:04:47,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:04:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-17 20:04:47,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:04:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 20:04:47,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:04:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 20:04:49,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680586521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:04:49,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:04:49,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 24] total 47 [2022-03-17 20:04:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469040382] [2022-03-17 20:04:49,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:04:49,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-17 20:04:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:04:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-17 20:04:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=1568, Unknown=0, NotChecked=0, Total=2162 [2022-03-17 20:04:49,154 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) [2022-03-17 20:06:24,957 WARN L232 SmtUtils]: Spent 11.58s 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) [2022-03-17 20:06:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:06:25,028 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2022-03-17 20:06:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-17 20:06:25,029 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 [2022-03-17 20:06:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:06:25,030 INFO L225 Difference]: With dead ends: 148 [2022-03-17 20:06:25,030 INFO L226 Difference]: Without dead ends: 116 [2022-03-17 20:06:25,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 96.6s TimeCoverageRelationStatistics Valid=2023, Invalid=5456, Unknown=3, NotChecked=0, Total=7482 [2022-03-17 20:06:25,033 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 20:06:25,034 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 159 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 20:06:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-17 20:06:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-03-17 20:06:25,050 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) [2022-03-17 20:06:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2022-03-17 20:06:25,066 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 61 [2022-03-17 20:06:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:06:25,066 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2022-03-17 20:06:25,066 INFO L479 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) [2022-03-17 20:06:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2022-03-17 20:06:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-17 20:06:25,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:06:25,074 INFO L500 BasicCegarLoop]: trace histogram [47, 39, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:06:25,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:06:25,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:06:25,280 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:06:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:06:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash -371956704, now seen corresponding path program 6 times [2022-03-17 20:06:25,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:06:25,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048530711] [2022-03-17 20:06:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:06:25,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:06:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:06:26,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:06:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:06:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 600 proven. 1560 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-17 20:06:26,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:06:26,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048530711] [2022-03-17 20:06:26,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048530711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:06:26,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697826409] [2022-03-17 20:06:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 20:06:26,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:06:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:06:26,248 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) [2022-03-17 20:06:26,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:06:28,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2022-03-17 20:06:28,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:06:28,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 20:06:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:06:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 663 proven. 64 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-17 20:06:28,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:06:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 663 proven. 64 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-17 20:06:30,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697826409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:06:30,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:06:30,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 11, 15] total 65 [2022-03-17 20:06:30,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972695589] [2022-03-17 20:06:30,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:06:30,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-17 20:06:30,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:06:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-17 20:06:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=935, Invalid=3225, Unknown=0, NotChecked=0, Total=4160 [2022-03-17 20:06:30,650 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) [2022-03-17 20:06:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:06:39,270 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2022-03-17 20:06:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-17 20:06:39,270 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 [2022-03-17 20:06:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:06:39,271 INFO L225 Difference]: With dead ends: 165 [2022-03-17 20:06:39,271 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 20:06:39,274 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2162, Invalid=11644, Unknown=0, NotChecked=0, Total=13806 [2022-03-17 20:06:39,274 INFO L912 BasicCegarLoop]: 7 mSDtfsCounter, 145 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 3146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-17 20:06:39,274 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 84 Invalid, 3146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-17 20:06:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 20:06:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 20:06:39,275 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) [2022-03-17 20:06:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 20:06:39,275 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2022-03-17 20:06:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:06:39,275 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 20:06:39,276 INFO L479 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) [2022-03-17 20:06:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 20:06:39,276 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 20:06:39,278 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 20:06:39,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 20:06:39,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:06:39,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 20:06:41,598 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 20:06:41,598 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:06:41,598 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:06:41,599 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 20:06:41,599 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 20:06:41,599 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:06:41,599 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:06:41,599 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 5 18) the Hoare annotation is: true [2022-03-17 20:06:41,599 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 14) the Hoare annotation is: (or (< (mod (+ main_~x~0 4294967295) 4294967296) 10000000) (= (mod main_~x~0 2) 0)) [2022-03-17 20:06:41,599 INFO L878 garLoopResultBuilder]: At program point L8-2(lines 8 14) the Hoare annotation is: (= (mod main_~x~0 2) 0) [2022-03-17 20:06:41,599 INFO L882 garLoopResultBuilder]: For program point L9(lines 9 13) no Hoare annotation was computed. [2022-03-17 20:06:41,599 INFO L882 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-03-17 20:06:41,599 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 5 18) no Hoare annotation was computed. [2022-03-17 20:06:41,599 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 5 18) no Hoare annotation was computed. [2022-03-17 20:06:41,599 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(line 4) the Hoare annotation is: true [2022-03-17 20:06:41,599 INFO L882 garLoopResultBuilder]: For program point L4(line 4) no Hoare annotation was computed. [2022-03-17 20:06:41,599 INFO L882 garLoopResultBuilder]: For program point L4-1(line 4) no Hoare annotation was computed. [2022-03-17 20:06:41,600 INFO L882 garLoopResultBuilder]: For program point L4-3(line 4) no Hoare annotation was computed. [2022-03-17 20:06:41,600 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2022-03-17 20:06:41,600 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(line 4) no Hoare annotation was computed. [2022-03-17 20:06:41,602 INFO L718 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2022-03-17 20:06:41,602 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 20:06:41,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:06:41 BasicIcfg [2022-03-17 20:06:41,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 20:06:41,613 INFO L158 Benchmark]: Toolchain (without parser) took 125842.02ms. Allocated memory was 207.6MB in the beginning and 287.3MB in the end (delta: 79.7MB). Free memory was 150.1MB in the beginning and 156.6MB in the end (delta: -6.6MB). Peak memory consumption was 136.2MB. Max. memory is 8.0GB. [2022-03-17 20:06:41,613 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 207.6MB. Free memory is still 166.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 20:06:41,613 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.36ms. Allocated memory is still 207.6MB. Free memory was 149.9MB in the beginning and 178.9MB in the end (delta: -29.0MB). Peak memory consumption was 12.2MB. Max. memory is 8.0GB. [2022-03-17 20:06:41,614 INFO L158 Benchmark]: Boogie Preprocessor took 19.50ms. Allocated memory is still 207.6MB. Free memory was 178.9MB in the beginning and 177.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 20:06:41,614 INFO L158 Benchmark]: RCFGBuilder took 261.32ms. Allocated memory is still 207.6MB. Free memory was 177.3MB in the beginning and 167.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 20:06:41,614 INFO L158 Benchmark]: IcfgTransformer took 15.29ms. Allocated memory is still 207.6MB. Free memory was 167.3MB in the beginning and 166.3MB in the end (delta: 973.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 20:06:41,615 INFO L158 Benchmark]: TraceAbstraction took 125331.79ms. Allocated memory was 207.6MB in the beginning and 287.3MB in the end (delta: 79.7MB). Free memory was 165.8MB in the beginning and 156.6MB in the end (delta: 9.2MB). Peak memory consumption was 152.3MB. Max. memory is 8.0GB. [2022-03-17 20:06:41,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 207.6MB. Free memory is still 166.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.36ms. Allocated memory is still 207.6MB. Free memory was 149.9MB in the beginning and 178.9MB in the end (delta: -29.0MB). Peak memory consumption was 12.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.50ms. Allocated memory is still 207.6MB. Free memory was 178.9MB in the beginning and 177.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 261.32ms. Allocated memory is still 207.6MB. Free memory was 177.3MB in the beginning and 167.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 15.29ms. Allocated memory is still 207.6MB. Free memory was 167.3MB in the beginning and 166.3MB in the end (delta: 973.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 125331.79ms. Allocated memory was 207.6MB in the beginning and 287.3MB in the end (delta: 79.7MB). Free memory was 165.8MB in the beginning and 156.6MB in the end (delta: 9.2MB). Peak memory consumption was 152.3MB. 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: 125.2s, OverallIterations: 9, TraceHistogramMax: 47, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 109.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 385 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 384 mSDsluCounter, 506 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 399 mSDsCounter, 919 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4249 IncrementalHoareTripleChecker+Invalid, 5168 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 919 mSolverCounterUnsat, 107 mSDtfsCounter, 4249 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, 110.5s 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 81 NumberOfFragments, 29 HoareAnnotationTreeSize, 17 FomulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 7 FomulaSimplificationsInter, 12699 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 7.5s 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 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: (x + 4294967295) % 4294967296 < 10000000 || x % 2 == 0 RESULT: Ultimate proved your program to be correct! [2022-03-17 20:06:41,643 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...