/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:06:20,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:06:20,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:06:20,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 23:06:20,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 23:06:20,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 23:06:20,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 23:06:20,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 23:06:20,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 23:06:20,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 23:06:20,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 23:06:20,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 23:06:20,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 23:06:20,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 23:06:20,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 23:06:20,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 23:06:20,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 23:06:20,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 23:06:20,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 23:06:20,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 23:06:20,766 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 23:06:20,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 23:06:20,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 23:06:20,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 23:06:20,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 23:06:20,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 23:06:20,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 23:06:20,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 23:06:20,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 23:06:20,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 23:06:20,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 23:06:20,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 23:06:20,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 23:06:20,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 23:06:20,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 23:06:20,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 23:06:20,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 23:06:20,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 23:06:20,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 23:06:20,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 23:06:20,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 23:06:20,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 23:06:20,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:06:20,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:06:20,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:06:20,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:06:20,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:06:20,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:06:20,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:06:20,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:06:20,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:06:20,823 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:06:20,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:06:20,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:06:20,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:06:20,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:06:20,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:06:20,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:06:20,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:06:20,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:06:20,827 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:06:20,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:06:20,827 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:06:20,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:06:20,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:06:20,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:06:20,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:06:20,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:06:20,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:06:20,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:06:20,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:06:20,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:06:20,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:06:20,828 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:06:20,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:06:20,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:06:20,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:06:21,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:06:21,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:06:21,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:06:21,059 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:06:21,061 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:06:21,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-03-19 23:06:21,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dc5107f2/fe373f8cfa0a437ab9251303b7f2d6c4/FLAG37ff2c7dd [2022-03-19 23:06:21,467 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:06:21,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-03-19 23:06:21,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dc5107f2/fe373f8cfa0a437ab9251303b7f2d6c4/FLAG37ff2c7dd [2022-03-19 23:06:21,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dc5107f2/fe373f8cfa0a437ab9251303b7f2d6c4 [2022-03-19 23:06:21,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:06:21,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:06:21,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:06:21,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:06:21,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:06:21,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ceecec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21, skipping insertion in model container [2022-03-19 23:06:21,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:06:21,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:06:21,647 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_14.c[319,332] [2022-03-19 23:06:21,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:06:21,663 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:06:21,674 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_14.c[319,332] [2022-03-19 23:06:21,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:06:21,687 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:06:21,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21 WrapperNode [2022-03-19 23:06:21,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:06:21,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:06:21,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:06:21,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:06:21,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:06:21,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:06:21,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:06:21,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:06:21,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (1/1) ... [2022-03-19 23:06:21,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:06:21,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:21,744 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) [2022-03-19 23:06:21,763 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 [2022-03-19 23:06:21,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:06:21,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:06:21,782 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:06:21,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:06:21,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:06:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:06:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:06:21,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:06:21,834 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:06:21,835 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:06:21,915 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:06:21,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:06:21,920 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 23:06:21,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:06:21 BoogieIcfgContainer [2022-03-19 23:06:21,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:06:21,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:06:21,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:06:21,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:06:21,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:06:21" (1/3) ... [2022-03-19 23:06:21,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24200040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:06:21, skipping insertion in model container [2022-03-19 23:06:21,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:06:21" (2/3) ... [2022-03-19 23:06:21,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24200040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:06:21, skipping insertion in model container [2022-03-19 23:06:21,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:06:21" (3/3) ... [2022-03-19 23:06:21,927 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2022-03-19 23:06:21,931 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:06:21,931 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:06:21,967 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:06:21,973 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=PETRI_NET, 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 [2022-03-19 23:06:21,973 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:06:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 23:06:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:06:21,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:21,997 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:21,998 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1104150160, now seen corresponding path program 1 times [2022-03-19 23:06:22,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:22,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655574972] [2022-03-19 23:06:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:22,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:06:22,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655574972] [2022-03-19 23:06:22,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655574972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:06:22,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:06:22,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:06:22,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146374574] [2022-03-19 23:06:22,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:06:22,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:06:22,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:06:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:06:22,162 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-03-19 23:06:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:22,228 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-03-19 23:06:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:06:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-03-19 23:06:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:22,235 INFO L225 Difference]: With dead ends: 36 [2022-03-19 23:06:22,235 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 23:06:22,237 INFO L912 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 [2022-03-19 23:06:22,245 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:22,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:06:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 23:06:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 23:06:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-03-19 23:06:22,283 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-03-19 23:06:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:22,284 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-03-19 23:06:22,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-03-19 23:06:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-03-19 23:06:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:06:22,285 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:22,285 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:22,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:06:22,285 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1394135754, now seen corresponding path program 1 times [2022-03-19 23:06:22,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:22,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536437548] [2022-03-19 23:06:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:06:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536437548] [2022-03-19 23:06:22,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536437548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:06:22,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:06:22,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:06:22,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874357898] [2022-03-19 23:06:22,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:06:22,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:06:22,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:22,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:06:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:06:22,372 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-03-19 23:06:22,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:22,418 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-03-19 23:06:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:06:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-03-19 23:06:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:22,419 INFO L225 Difference]: With dead ends: 30 [2022-03-19 23:06:22,419 INFO L226 Difference]: Without dead ends: 19 [2022-03-19 23:06:22,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:06:22,421 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:22,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:06:22,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-19 23:06:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-19 23:06:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-03-19 23:06:22,428 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-03-19 23:06:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:22,428 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-03-19 23:06:22,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-03-19 23:06:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-03-19 23:06:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 23:06:22,429 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:22,429 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:22,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:06:22,429 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash 479542393, now seen corresponding path program 1 times [2022-03-19 23:06:22,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:22,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091724906] [2022-03-19 23:06:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:22,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:06:22,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091724906] [2022-03-19 23:06:22,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091724906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:06:22,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:06:22,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:06:22,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917844105] [2022-03-19 23:06:22,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:06:22,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:06:22,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:06:22,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:06:22,511 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-19 23:06:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:22,560 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-19 23:06:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:06:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-03-19 23:06:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:22,563 INFO L225 Difference]: With dead ends: 28 [2022-03-19 23:06:22,563 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 23:06:22,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:06:22,570 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:22,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:06:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 23:06:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 23:06:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-19 23:06:22,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-03-19 23:06:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:22,578 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-19 23:06:22,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-19 23:06:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-19 23:06:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 23:06:22,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:22,579 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:22,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:06:22,579 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2015526538, now seen corresponding path program 1 times [2022-03-19 23:06:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:22,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568559128] [2022-03-19 23:06:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:06:22,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:22,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568559128] [2022-03-19 23:06:22,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568559128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:22,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103705652] [2022-03-19 23:06:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:22,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:22,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:22,640 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) [2022-03-19 23:06:22,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:06:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:22,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 23:06:22,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:06:22,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:06:22,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103705652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:22,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:22,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 23:06:22,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423798683] [2022-03-19 23:06:22,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:22,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:06:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:06:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:06:22,792 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-03-19 23:06:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:22,865 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-03-19 23:06:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:06:22,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 15 [2022-03-19 23:06:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:22,866 INFO L225 Difference]: With dead ends: 37 [2022-03-19 23:06:22,867 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 23:06:22,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:06:22,868 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:22,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:06:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 23:06:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-19 23:06:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-19 23:06:22,874 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2022-03-19 23:06:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:22,874 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-19 23:06:22,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-03-19 23:06:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-19 23:06:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:06:22,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:22,875 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:22,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:06:23,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:23,098 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:23,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1261671005, now seen corresponding path program 1 times [2022-03-19 23:06:23,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:23,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387624568] [2022-03-19 23:06:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:23,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:06:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387624568] [2022-03-19 23:06:23,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387624568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95867339] [2022-03-19 23:06:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:23,176 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) [2022-03-19 23:06:23,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:06:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:06:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:06:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:06:23,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95867339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:23,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:23,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 23:06:23,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356631974] [2022-03-19 23:06:23,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:23,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:06:23,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:23,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:06:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:06:23,351 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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) [2022-03-19 23:06:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:23,465 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-03-19 23:06:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:06:23,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 21 [2022-03-19 23:06:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:23,478 INFO L225 Difference]: With dead ends: 48 [2022-03-19 23:06:23,478 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 23:06:23,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:06:23,479 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:23,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 39 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:06:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 23:06:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 23:06:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-19 23:06:23,486 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2022-03-19 23:06:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:23,486 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-19 23:06:23,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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) [2022-03-19 23:06:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-19 23:06:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 23:06:23,487 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:23,487 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:23,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 23:06:23,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:23,716 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash 177016657, now seen corresponding path program 2 times [2022-03-19 23:06:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794914600] [2022-03-19 23:06:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:23,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:06:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794914600] [2022-03-19 23:06:23,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794914600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209707034] [2022-03-19 23:06:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:06:23,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:23,847 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) [2022-03-19 23:06:23,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:06:23,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:06:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:06:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:06:23,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:06:24,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209707034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:24,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:24,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 23:06:24,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546786508] [2022-03-19 23:06:24,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:24,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:06:24,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:24,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:06:24,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:06:24,126 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 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) [2022-03-19 23:06:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:24,358 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-03-19 23:06:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:06:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 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 29 [2022-03-19 23:06:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:24,362 INFO L225 Difference]: With dead ends: 64 [2022-03-19 23:06:24,362 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 23:06:24,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:06:24,367 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:24,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:06:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 23:06:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-19 23:06:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-03-19 23:06:24,380 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2022-03-19 23:06:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:24,380 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-03-19 23:06:24,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 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) [2022-03-19 23:06:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-03-19 23:06:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 23:06:24,381 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:24,382 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:24,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:06:24,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:24,588 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash -290624199, now seen corresponding path program 3 times [2022-03-19 23:06:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:24,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907974621] [2022-03-19 23:06:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:24,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:24,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:06:24,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:24,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907974621] [2022-03-19 23:06:24,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907974621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:24,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461276637] [2022-03-19 23:06:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:06:24,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:24,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:24,813 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) [2022-03-19 23:06:24,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:06:24,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:06:24,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:06:24,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 23:06:24,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 23:06:25,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461276637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:25,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:25,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-19 23:06:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434469151] [2022-03-19 23:06:25,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:25,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 23:06:25,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 23:06:25,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:06:25,072 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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) [2022-03-19 23:06:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:25,430 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-03-19 23:06:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:06:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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 45 [2022-03-19 23:06:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:25,432 INFO L225 Difference]: With dead ends: 75 [2022-03-19 23:06:25,432 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 23:06:25,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1308, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 23:06:25,434 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:25,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 36 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:06:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 23:06:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-03-19 23:06:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 48 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-03-19 23:06:25,446 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 45 [2022-03-19 23:06:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:25,447 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-03-19 23:06:25,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 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) [2022-03-19 23:06:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-03-19 23:06:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 23:06:25,448 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:25,448 INFO L499 BasicCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:25,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:06:25,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:25,651 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash -745373331, now seen corresponding path program 4 times [2022-03-19 23:06:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:25,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805312236] [2022-03-19 23:06:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:25,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:25,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:06:25,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:25,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805312236] [2022-03-19 23:06:25,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805312236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:25,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98370170] [2022-03-19 23:06:25,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:06:25,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:25,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:25,850 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) [2022-03-19 23:06:25,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:06:25,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:06:25,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:06:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:06:26,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:06:26,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98370170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:26,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:26,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-19 23:06:26,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239094319] [2022-03-19 23:06:26,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:26,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 23:06:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 23:06:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 23:06:26,437 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 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) [2022-03-19 23:06:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:27,073 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2022-03-19 23:06:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:06:27,073 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 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 50 [2022-03-19 23:06:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:27,074 INFO L225 Difference]: With dead ends: 106 [2022-03-19 23:06:27,074 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 23:06:27,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:06:27,077 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:27,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 34 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:06:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 23:06:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-19 23:06:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 82 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-03-19 23:06:27,087 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 50 [2022-03-19 23:06:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:27,087 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-03-19 23:06:27,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 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) [2022-03-19 23:06:27,088 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-03-19 23:06:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 23:06:27,089 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:27,089 INFO L499 BasicCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:27,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:06:27,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:27,313 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1338912608, now seen corresponding path program 5 times [2022-03-19 23:06:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:27,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434235290] [2022-03-19 23:06:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:27,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:27,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:06:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434235290] [2022-03-19 23:06:27,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434235290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:27,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473542427] [2022-03-19 23:06:27,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:06:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:27,854 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) [2022-03-19 23:06:27,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:06:27,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-03-19 23:06:27,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:27,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:06:27,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:06:28,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:06:29,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473542427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:29,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:29,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-19 23:06:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111644743] [2022-03-19 23:06:29,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:29,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 23:06:29,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 23:06:29,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 23:06:29,450 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 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) [2022-03-19 23:06:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:31,360 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2022-03-19 23:06:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 23:06:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 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 84 [2022-03-19 23:06:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:31,363 INFO L225 Difference]: With dead ends: 174 [2022-03-19 23:06:31,363 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 23:06:31,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 23:06:31,368 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:31,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 59 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:06:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 23:06:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-19 23:06:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 150 states have internal predecessors, (154), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:06:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-03-19 23:06:31,383 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 84 [2022-03-19 23:06:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:31,383 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-03-19 23:06:31,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 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) [2022-03-19 23:06:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-03-19 23:06:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-19 23:06:31,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:31,385 INFO L499 BasicCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:31,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:06:31,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:31,608 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1091762374, now seen corresponding path program 6 times [2022-03-19 23:06:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:31,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899621074] [2022-03-19 23:06:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 23:06:33,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899621074] [2022-03-19 23:06:33,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899621074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812676440] [2022-03-19 23:06:33,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:06:33,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:33,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:33,180 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) [2022-03-19 23:06:33,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:06:33,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 23:06:33,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:33,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 23:06:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-19 23:06:33,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4628 trivial. 0 not checked. [2022-03-19 23:06:34,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812676440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:34,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:34,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 6] total 79 [2022-03-19 23:06:34,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372169816] [2022-03-19 23:06:34,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:34,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 23:06:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:34,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 23:06:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2371, Invalid=3791, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 23:06:34,105 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 77 states have internal predecessors, (166), 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) [2022-03-19 23:06:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:36,721 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2022-03-19 23:06:36,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 23:06:36,722 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 77 states have internal predecessors, (166), 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 152 [2022-03-19 23:06:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:36,723 INFO L225 Difference]: With dead ends: 186 [2022-03-19 23:06:36,723 INFO L226 Difference]: Without dead ends: 168 [2022-03-19 23:06:36,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7377, Invalid=16493, Unknown=0, NotChecked=0, Total=23870 [2022-03-19 23:06:36,728 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 89 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:36,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 89 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:06:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-19 23:06:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-03-19 23:06:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 155 states have (on average 1.038709677419355) internal successors, (161), 157 states have internal predecessors, (161), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:06:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 169 transitions. [2022-03-19 23:06:36,745 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 169 transitions. Word has length 152 [2022-03-19 23:06:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:36,745 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 169 transitions. [2022-03-19 23:06:36,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 77 states have internal predecessors, (166), 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) [2022-03-19 23:06:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 169 transitions. [2022-03-19 23:06:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 23:06:36,747 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:36,747 INFO L499 BasicCegarLoop]: trace histogram [69, 67, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:36,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:06:36,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:36,965 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1880330618, now seen corresponding path program 7 times [2022-03-19 23:06:36,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:36,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238018401] [2022-03-19 23:06:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:38,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:06:38,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:38,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238018401] [2022-03-19 23:06:38,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238018401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:38,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298026332] [2022-03-19 23:06:38,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:06:38,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:38,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:38,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:06:38,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:06:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:38,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 23:06:38,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:06:38,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:06:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4776 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:06:43,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298026332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:06:43,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:06:43,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-19 23:06:43,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057190634] [2022-03-19 23:06:43,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:06:43,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-19 23:06:43,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:06:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-19 23:06:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:06:43,337 INFO L87 Difference]: Start difference. First operand 164 states and 169 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 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) [2022-03-19 23:06:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:06:49,597 INFO L93 Difference]: Finished difference Result 326 states and 405 transitions. [2022-03-19 23:06:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-19 23:06:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 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 155 [2022-03-19 23:06:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:06:49,600 INFO L225 Difference]: With dead ends: 326 [2022-03-19 23:06:49,600 INFO L226 Difference]: Without dead ends: 302 [2022-03-19 23:06:49,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-19 23:06:49,606 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 148 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:06:49,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 59 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:06:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-19 23:06:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-03-19 23:06:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 293 states have (on average 1.0204778156996588) internal successors, (299), 295 states have internal predecessors, (299), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:06:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 307 transitions. [2022-03-19 23:06:49,625 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 307 transitions. Word has length 155 [2022-03-19 23:06:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:06:49,625 INFO L478 AbstractCegarLoop]: Abstraction has 302 states and 307 transitions. [2022-03-19 23:06:49,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 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) [2022-03-19 23:06:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 307 transitions. [2022-03-19 23:06:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-19 23:06:49,629 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:06:49,629 INFO L499 BasicCegarLoop]: trace histogram [138, 136, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:06:49,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:06:49,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 23:06:49,844 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:06:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:06:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1229399029, now seen corresponding path program 8 times [2022-03-19 23:06:49,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:06:49,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096498042] [2022-03-19 23:06:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:06:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:06:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:06:55,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:55,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096498042] [2022-03-19 23:06:55,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096498042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:55,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554364420] [2022-03-19 23:06:55,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:06:55,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:55,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:06:55,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:06:55,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:06:55,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-19 23:06:55,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:06:56,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:07:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 19059 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:07:13,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554364420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:07:13,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:07:13,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-19 23:07:13,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605045450] [2022-03-19 23:07:13,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:07:13,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-19 23:07:13,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:07:13,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-19 23:07:13,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-19 23:07:13,048 INFO L87 Difference]: Start difference. First operand 302 states and 307 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 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) [2022-03-19 23:07:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:07:36,634 INFO L93 Difference]: Finished difference Result 602 states and 750 transitions. [2022-03-19 23:07:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-19 23:07:36,635 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 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 293 [2022-03-19 23:07:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:07:36,638 INFO L225 Difference]: With dead ends: 602 [2022-03-19 23:07:36,638 INFO L226 Difference]: Without dead ends: 578 [2022-03-19 23:07:36,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-19 23:07:36,651 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 286 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:07:36,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 64 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 23:07:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-03-19 23:07:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2022-03-19 23:07:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 569 states have (on average 1.0105448154657293) internal successors, (575), 571 states have internal predecessors, (575), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:07:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 583 transitions. [2022-03-19 23:07:36,679 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 583 transitions. Word has length 293 [2022-03-19 23:07:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:07:36,679 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 583 transitions. [2022-03-19 23:07:36,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 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) [2022-03-19 23:07:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 583 transitions. [2022-03-19 23:07:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2022-03-19 23:07:36,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:07:36,688 INFO L499 BasicCegarLoop]: trace histogram [276, 274, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:07:36,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 23:07:36,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:07:36,903 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:07:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:07:36,904 INFO L85 PathProgramCache]: Analyzing trace with hash -79164051, now seen corresponding path program 9 times [2022-03-19 23:07:36,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:07:36,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292658583] [2022-03-19 23:07:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:07:36,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:07:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:07:59,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:07:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:07:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:07:59,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:07:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292658583] [2022-03-19 23:07:59,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292658583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:07:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812413452] [2022-03-19 23:07:59,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:07:59,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:07:59,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:07:59,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:07:59,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:07:59,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:07:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:07:59,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:07:59,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:08:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 826 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-19 23:08:00,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:08:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 76191 backedges. 826 proven. 15 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-19 23:08:02,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812413452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:08:02,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:08:02,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 9, 9] total 292 [2022-03-19 23:08:02,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27803025] [2022-03-19 23:08:02,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:08:02,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 292 states [2022-03-19 23:08:02,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:08:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 292 interpolants. [2022-03-19 23:08:02,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38347, Invalid=46625, Unknown=0, NotChecked=0, Total=84972 [2022-03-19 23:08:02,222 INFO L87 Difference]: Start difference. First operand 578 states and 583 transitions. Second operand has 292 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 291 states have internal predecessors, (588), 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) [2022-03-19 23:08:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:08:33,288 INFO L93 Difference]: Finished difference Result 618 states and 640 transitions. [2022-03-19 23:08:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-03-19 23:08:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 292 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 291 states have internal predecessors, (588), 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 569 [2022-03-19 23:08:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:08:33,292 INFO L225 Difference]: With dead ends: 618 [2022-03-19 23:08:33,292 INFO L226 Difference]: Without dead ends: 594 [2022-03-19 23:08:33,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1704 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45809 ImplicationChecksByTransitivity, 51.7s TimeCoverageRelationStatistics Valid=121338, Invalid=214482, Unknown=0, NotChecked=0, Total=335820 [2022-03-19 23:08:33,305 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 1676 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 1419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1419 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:08:33,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1677 Valid, 86 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1419 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:08:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-19 23:08:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 588. [2022-03-19 23:08:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 579 states have (on average 1.0103626943005182) internal successors, (585), 581 states have internal predecessors, (585), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:08:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 593 transitions. [2022-03-19 23:08:33,336 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 593 transitions. Word has length 569 [2022-03-19 23:08:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:08:33,337 INFO L478 AbstractCegarLoop]: Abstraction has 588 states and 593 transitions. [2022-03-19 23:08:33,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 292 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 291 states have internal predecessors, (588), 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) [2022-03-19 23:08:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 593 transitions. [2022-03-19 23:08:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-03-19 23:08:33,347 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:08:33,347 INFO L499 BasicCegarLoop]: trace histogram [277, 275, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:08:33,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 23:08:33,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 23:08:33,563 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:08:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:08:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1606490486, now seen corresponding path program 10 times [2022-03-19 23:08:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:08:33,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153124744] [2022-03-19 23:08:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:08:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:08:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:08:56,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:08:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:08:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 76820 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:08:56,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:08:56,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153124744] [2022-03-19 23:08:56,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153124744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:08:56,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624571400] [2022-03-19 23:08:56,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:08:56,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:08:56,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:08:56,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:08:56,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:08:56,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:08:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:08:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-19 23:08:56,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:08:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 76820 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:08:57,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:10:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 76820 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:10:05,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624571400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:10:05,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:10:05,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-19 23:10:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776432468] [2022-03-19 23:10:05,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:10:05,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-19 23:10:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:10:05,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-19 23:10:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-19 23:10:05,572 INFO L87 Difference]: Start difference. First operand 588 states and 593 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 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) [2022-03-19 23:11:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:11:44,821 INFO L93 Difference]: Finished difference Result 1174 states and 1461 transitions. [2022-03-19 23:11:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-19 23:11:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 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 579 [2022-03-19 23:11:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:11:44,828 INFO L225 Difference]: With dead ends: 1174 [2022-03-19 23:11:44,828 INFO L226 Difference]: Without dead ends: 1142 [2022-03-19 23:11:44,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1989 GetRequests, 883 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 180.2s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-19 23:11:44,899 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 564 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:11:44,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 44 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:11:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-03-19 23:11:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1142. [2022-03-19 23:11:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1133 states have (on average 1.0052956751985878) internal successors, (1139), 1135 states have internal predecessors, (1139), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:11:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1147 transitions. [2022-03-19 23:11:44,960 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1147 transitions. Word has length 579 [2022-03-19 23:11:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:11:44,961 INFO L478 AbstractCegarLoop]: Abstraction has 1142 states and 1147 transitions. [2022-03-19 23:11:44,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 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) [2022-03-19 23:11:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1147 transitions. [2022-03-19 23:11:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1134 [2022-03-19 23:11:44,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:11:44,973 INFO L499 BasicCegarLoop]: trace histogram [554, 552, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:11:44,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 23:11:45,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 23:11:45,187 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:11:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:11:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash 539588011, now seen corresponding path program 11 times [2022-03-19 23:11:45,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:11:45,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773762078] [2022-03-19 23:11:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:11:45,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:11:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 307007 backedges. 1659 proven. 305256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:13:18,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773762078] [2022-03-19 23:13:18,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773762078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516776828] [2022-03-19 23:13:18,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:13:18,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:18,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:18,032 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:13:18,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:13:19,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 555 check-sat command(s) [2022-03-19 23:13:19,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:13:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 2367 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-19 23:13:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 307007 backedges. 1659 proven. 305256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 23:13:21,949 INFO L328 TraceCheckSpWp]: Computing backward predicates...