/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:29:28,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:29:28,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:29:28,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 05:29:28,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 05:29:28,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 05:29:28,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 05:29:28,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 05:29:28,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 05:29:28,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 05:29:28,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 05:29:28,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 05:29:28,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:29:28,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:29:28,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:29:28,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:29:28,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:29:28,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:29:28,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:29:28,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:29:28,841 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:29:28,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:29:28,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:29:28,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:29:28,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:29:28,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:29:28,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:29:28,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:29:28,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:29:28,855 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:29:28,877 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:29:28,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:29:28,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:29:28,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:29:28,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:29:28,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:29:28,879 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:29:28,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:29:28,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:29:28,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:29:28,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:29:28,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:29:28,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:29:28,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:29:28,880 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:29:28,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:29:28,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:29:28,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:29:28,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:29:28,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:29:28,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:29:28,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:29:28,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:29:28,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:29:28,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:29:28,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:29:28,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:29:28,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:29:28,882 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:29:28,882 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:29:29,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:29:29,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:29:29,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:29:29,123 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:29:29,124 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:29:29,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2022-04-05 05:29:29,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c930333/45fccf4a444c4ec191a5c85b6b5f8e07/FLAG987348afe [2022-04-05 05:29:29,570 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:29:29,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i [2022-04-05 05:29:29,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c930333/45fccf4a444c4ec191a5c85b6b5f8e07/FLAG987348afe [2022-04-05 05:29:29,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c930333/45fccf4a444c4ec191a5c85b6b5f8e07 [2022-04-05 05:29:29,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:29:29,595 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:29:29,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:29:29,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:29:29,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:29:29,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f0b33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29, skipping insertion in model container [2022-04-05 05:29:29,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:29:29,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:29:29,770 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2022-04-05 05:29:29,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:29:29,789 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:29:29,799 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2022-04-05 05:29:29,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:29:29,811 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:29:29,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29 WrapperNode [2022-04-05 05:29:29,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:29:29,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:29:29,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:29:29,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:29:29,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:29:29,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:29:29,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:29:29,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:29:29,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (1/1) ... [2022-04-05 05:29:29,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:29:29,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:29,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 05:29:29,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 05:29:29,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:29:29,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:29:29,903 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:29:29,903 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 05:29:29,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:29:29,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:29:29,903 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:29:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:29:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 05:29:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 05:29:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:29:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:29:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 05:29:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:29:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 05:29:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:29:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:29:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:29:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:29:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:29:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:29:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:29:29,973 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:29:29,976 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:29:30,115 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:29:30,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:29:30,120 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 05:29:30,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:29:30 BoogieIcfgContainer [2022-04-05 05:29:30,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:29:30,122 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:29:30,122 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:29:30,123 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:29:30,126 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:29:30" (1/1) ... [2022-04-05 05:29:30,128 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:29:30,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:29:30 BasicIcfg [2022-04-05 05:29:30,159 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:29:30,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:29:30,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:29:30,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:29:30,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:29:29" (1/4) ... [2022-04-05 05:29:30,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bc3ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:29:30, skipping insertion in model container [2022-04-05 05:29:30,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:29:29" (2/4) ... [2022-04-05 05:29:30,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bc3ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:29:30, skipping insertion in model container [2022-04-05 05:29:30,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:29:30" (3/4) ... [2022-04-05 05:29:30,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bc3ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:29:30, skipping insertion in model container [2022-04-05 05:29:30,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:29:30" (4/4) ... [2022-04-05 05:29:30,167 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.iqvasr [2022-04-05 05:29:30,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:29:30,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:29:30,248 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:29:30,260 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 05:29:30,261 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:29:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 05:29:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 05:29:30,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:30,289 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:30,289 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:30,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1859546765, now seen corresponding path program 1 times [2022-04-05 05:29:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:30,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975389176] [2022-04-05 05:29:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:30,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:30,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:30,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:30,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975389176] [2022-04-05 05:29:30,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975389176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:29:30,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:29:30,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:29:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571932020] [2022-04-05 05:29:30,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:29:30,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:29:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:30,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:29:30,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:29:30,509 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:30,554 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-05 05:29:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:29:30,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-05 05:29:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:30,561 INFO L225 Difference]: With dead ends: 32 [2022-04-05 05:29:30,561 INFO L226 Difference]: Without dead ends: 13 [2022-04-05 05:29:30,564 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 [2022-04-05 05:29:30,568 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:30,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:29:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-05 05:29:30,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-05 05:29:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-05 05:29:30,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-04-05 05:29:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:30,604 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-05 05:29:30,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-05 05:29:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 05:29:30,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:30,606 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:30,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:29:30,607 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1860470286, now seen corresponding path program 1 times [2022-04-05 05:29:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:30,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226591757] [2022-04-05 05:29:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:30,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:30,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:30,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226591757] [2022-04-05 05:29:30,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226591757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:29:30,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:29:30,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:29:30,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923776549] [2022-04-05 05:29:30,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:29:30,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:29:30,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:29:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:29:30,692 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:30,728 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-04-05 05:29:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:29:30,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-05 05:29:30,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:30,730 INFO L225 Difference]: With dead ends: 20 [2022-04-05 05:29:30,730 INFO L226 Difference]: Without dead ends: 15 [2022-04-05 05:29:30,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:29:30,736 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:30,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:29:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-05 05:29:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-04-05 05:29:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-05 05:29:30,749 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-04-05 05:29:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:30,749 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-05 05:29:30,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-05 05:29:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 05:29:30,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:30,750 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:30,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:29:30,750 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2116914316, now seen corresponding path program 1 times [2022-04-05 05:29:30,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:30,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591731373] [2022-04-05 05:29:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:30,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591731373] [2022-04-05 05:29:30,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591731373] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:29:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199498217] [2022-04-05 05:29:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:30,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:30,818 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) [2022-04-05 05:29:30,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:29:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:30,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 05:29:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:30,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:29:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:31,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199498217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:29:31,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:29:31,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 05:29:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611335146] [2022-04-05 05:29:31,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:29:31,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 05:29:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:31,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 05:29:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 05:29:31,011 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-04-05 05:29:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:31,088 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-05 05:29:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:29:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-05 05:29:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:31,091 INFO L225 Difference]: With dead ends: 25 [2022-04-05 05:29:31,091 INFO L226 Difference]: Without dead ends: 20 [2022-04-05 05:29:31,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:29:31,095 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:31,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:29:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-05 05:29:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-05 05:29:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-04-05 05:29:31,103 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2022-04-05 05:29:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:31,104 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-04-05 05:29:31,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-04-05 05:29:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-04-05 05:29:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-05 05:29:31,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:31,105 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:31,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:29:31,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:31,330 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1596837114, now seen corresponding path program 2 times [2022-04-05 05:29:31,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744483166] [2022-04-05 05:29:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:31,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:31,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:31,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744483166] [2022-04-05 05:29:31,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744483166] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:29:31,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494967716] [2022-04-05 05:29:31,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:29:31,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:31,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:31,415 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) [2022-04-05 05:29:31,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:29:31,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:29:31,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:29:31,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 05:29:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:31,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:29:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:31,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494967716] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:29:31,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:29:31,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-05 05:29:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127593801] [2022-04-05 05:29:31,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:29:31,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 05:29:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 05:29:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-05 05:29:31,647 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-04-05 05:29:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:31,812 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-04-05 05:29:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 05:29:31,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-05 05:29:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:31,813 INFO L225 Difference]: With dead ends: 37 [2022-04-05 05:29:31,813 INFO L226 Difference]: Without dead ends: 32 [2022-04-05 05:29:31,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-04-05 05:29:31,814 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:31,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:29:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-05 05:29:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-05 05:29:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-04-05 05:29:31,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2022-04-05 05:29:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:31,819 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-04-05 05:29:31,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-04-05 05:29:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-04-05 05:29:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 05:29:31,820 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:31,820 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:31,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:29:32,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-05 05:29:32,033 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:32,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1511565958, now seen corresponding path program 3 times [2022-04-05 05:29:32,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:32,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833950428] [2022-04-05 05:29:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:32,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:32,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:32,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:32,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833950428] [2022-04-05 05:29:32,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833950428] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:29:32,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481909022] [2022-04-05 05:29:32,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:29:32,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:32,195 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) [2022-04-05 05:29:32,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:29:32,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-05 05:29:32,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:29:32,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 05:29:32,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:32,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:29:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:32,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481909022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:29:32,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:29:32,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-05 05:29:32,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957049789] [2022-04-05 05:29:32,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:29:32,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 05:29:32,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 05:29:32,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-05 05:29:32,569 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-04-05 05:29:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:32,945 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-04-05 05:29:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 05:29:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 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 31 [2022-04-05 05:29:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:32,947 INFO L225 Difference]: With dead ends: 61 [2022-04-05 05:29:32,947 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 05:29:32,948 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-04-05 05:29:32,949 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:32,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 38 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:29:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 05:29:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-05 05:29:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-04-05 05:29:32,956 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 31 [2022-04-05 05:29:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:32,956 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-04-05 05:29:32,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 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) [2022-04-05 05:29:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-04-05 05:29:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 05:29:32,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:32,958 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:32,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:29:33,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:33,179 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:33,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:33,180 INFO L85 PathProgramCache]: Analyzing trace with hash -739610526, now seen corresponding path program 4 times [2022-04-05 05:29:33,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:33,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648717211] [2022-04-05 05:29:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:33,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:33,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:33,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648717211] [2022-04-05 05:29:33,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648717211] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:29:33,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242933629] [2022-04-05 05:29:33,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:29:33,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:33,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:33,532 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) [2022-04-05 05:29:33,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:29:33,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:29:33,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:29:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 05:29:33,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:33,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:29:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:34,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242933629] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:29:34,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:29:34,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-05 05:29:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500473521] [2022-04-05 05:29:34,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:29:34,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-05 05:29:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:34,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-05 05:29:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 05:29:34,441 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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) [2022-04-05 05:29:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:35,522 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2022-04-05 05:29:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-05 05:29:35,522 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 55 [2022-04-05 05:29:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:35,524 INFO L225 Difference]: With dead ends: 109 [2022-04-05 05:29:35,524 INFO L226 Difference]: Without dead ends: 104 [2022-04-05 05:29:35,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-04-05 05:29:35,528 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:35,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 33 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:29:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-05 05:29:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-05 05:29:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-04-05 05:29:35,539 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 55 [2022-04-05 05:29:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:35,539 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-04-05 05:29:35,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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) [2022-04-05 05:29:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-04-05 05:29:35,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-05 05:29:35,540 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:35,541 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:35,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:29:35,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:35,759 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash 652213810, now seen corresponding path program 5 times [2022-04-05 05:29:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:35,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761516750] [2022-04-05 05:29:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:35,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:36,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:36,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:36,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761516750] [2022-04-05 05:29:36,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761516750] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:29:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791162808] [2022-04-05 05:29:36,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:29:36,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:36,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:36,680 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) [2022-04-05 05:29:36,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:29:36,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-04-05 05:29:36,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:29:36,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-05 05:29:36,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:36,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:29:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:39,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791162808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:29:39,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:29:39,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-05 05:29:39,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532348608] [2022-04-05 05:29:39,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:29:39,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-05 05:29:39,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:39,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-05 05:29:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-04-05 05:29:39,249 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 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) [2022-04-05 05:29:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:29:42,355 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2022-04-05 05:29:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-05 05:29:42,356 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 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 103 [2022-04-05 05:29:42,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:29:42,357 INFO L225 Difference]: With dead ends: 205 [2022-04-05 05:29:42,357 INFO L226 Difference]: Without dead ends: 200 [2022-04-05 05:29:42,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-04-05 05:29:42,364 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 241 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:29:42,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 43 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:29:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-05 05:29:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-04-05 05:29:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:29:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2022-04-05 05:29:42,379 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 103 [2022-04-05 05:29:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:29:42,379 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2022-04-05 05:29:42,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 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) [2022-04-05 05:29:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2022-04-05 05:29:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-05 05:29:42,382 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:29:42,382 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:29:42,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:29:42,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:42,591 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:29:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:29:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash 149453266, now seen corresponding path program 6 times [2022-04-05 05:29:42,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:29:42,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647399233] [2022-04-05 05:29:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:29:42,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:29:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:45,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:29:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:29:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:45,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:29:45,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647399233] [2022-04-05 05:29:45,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647399233] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:29:45,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555412539] [2022-04-05 05:29:45,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:29:45,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:29:45,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:29:45,536 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) [2022-04-05 05:29:45,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 05:29:45,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-04-05 05:29:45,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:29:45,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-05 05:29:45,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:29:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:46,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:29:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:29:54,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555412539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:29:54,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:29:54,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-04-05 05:29:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460049547] [2022-04-05 05:29:54,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:29:54,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-04-05 05:29:54,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:29:54,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-04-05 05:29:54,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-04-05 05:29:54,368 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 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) [2022-04-05 05:30:05,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:05,959 INFO L93 Difference]: Finished difference Result 397 states and 492 transitions. [2022-04-05 05:30:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-04-05 05:30:05,960 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 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 199 [2022-04-05 05:30:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:05,962 INFO L225 Difference]: With dead ends: 397 [2022-04-05 05:30:05,962 INFO L226 Difference]: Without dead ends: 392 [2022-04-05 05:30:05,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22984 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=55201, Invalid=91871, Unknown=0, NotChecked=0, Total=147072 [2022-04-05 05:30:05,971 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 386 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:05,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 43 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 05:30:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-04-05 05:30:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-04-05 05:30:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 387 states have (on average 1.0025839793281655) internal successors, (388), 387 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 392 transitions. [2022-04-05 05:30:06,004 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 392 transitions. Word has length 199 [2022-04-05 05:30:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:06,005 INFO L478 AbstractCegarLoop]: Abstraction has 392 states and 392 transitions. [2022-04-05 05:30:06,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 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) [2022-04-05 05:30:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 392 transitions. [2022-04-05 05:30:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-04-05 05:30:06,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:06,012 INFO L499 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:06,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 05:30:06,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:06,227 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash 7270674, now seen corresponding path program 7 times [2022-04-05 05:30:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641481142] [2022-04-05 05:30:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:17,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:17,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:17,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641481142] [2022-04-05 05:30:17,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641481142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:17,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616211382] [2022-04-05 05:30:17,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:30:17,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:17,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:17,387 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) [2022-04-05 05:30:17,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 05:30:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 192 conjunts are in the unsatisfiable core [2022-04-05 05:30:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:18,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:50,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616211382] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:50,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:50,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 193, 193] total 386 [2022-04-05 05:30:50,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017018678] [2022-04-05 05:30:50,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:50,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-04-05 05:30:50,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-04-05 05:30:50,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2022-04-05 05:30:50,890 INFO L87 Difference]: Start difference. First operand 392 states and 392 transitions. Second operand has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 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) [2022-04-05 05:31:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:31:38,458 INFO L93 Difference]: Finished difference Result 781 states and 972 transitions. [2022-04-05 05:31:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2022-04-05 05:31:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 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 391 [2022-04-05 05:31:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:31:38,462 INFO L225 Difference]: With dead ends: 781 [2022-04-05 05:31:38,462 INFO L226 Difference]: Without dead ends: 776 [2022-04-05 05:31:38,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1358 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 766 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92056 ImplicationChecksByTransitivity, 85.9s TimeCoverageRelationStatistics Valid=220993, Invalid=368063, Unknown=0, NotChecked=0, Total=589056 [2022-04-05 05:31:38,491 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 961 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 05:31:38,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 28 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-05 05:31:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-04-05 05:31:38,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-04-05 05:31:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 771 states have (on average 1.0012970168612192) internal successors, (772), 771 states have internal predecessors, (772), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:31:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 776 transitions. [2022-04-05 05:31:38,515 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 776 transitions. Word has length 391 [2022-04-05 05:31:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:31:38,516 INFO L478 AbstractCegarLoop]: Abstraction has 776 states and 776 transitions. [2022-04-05 05:31:38,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 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) [2022-04-05 05:31:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 776 transitions. [2022-04-05 05:31:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2022-04-05 05:31:38,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:31:38,537 INFO L499 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:31:38,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 05:31:38,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:31:38,751 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:31:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:31:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash -716054638, now seen corresponding path program 8 times [2022-04-05 05:31:38,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:31:38,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54234209] [2022-04-05 05:31:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:31:38,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:31:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:22,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:32:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:32:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:22,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:32:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54234209] [2022-04-05 05:32:22,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54234209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:32:22,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463131912] [2022-04-05 05:32:22,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:32:22,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:32:22,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:32:22,692 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) [2022-04-05 05:32:22,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 05:32:22,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:32:22,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:32:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 384 conjunts are in the unsatisfiable core [2022-04-05 05:32:22,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:32:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:24,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:34:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:34:35,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463131912] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:34:35,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:34:35,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [386, 385, 385] total 770 [2022-04-05 05:34:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043973649] [2022-04-05 05:34:35,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:34:35,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 770 states [2022-04-05 05:34:35,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:34:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 770 interpolants. [2022-04-05 05:34:35,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295298, Invalid=296832, Unknown=0, NotChecked=0, Total=592130 [2022-04-05 05:34:35,651 INFO L87 Difference]: Start difference. First operand 776 states and 776 transitions. Second operand has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 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) [2022-04-05 05:37:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:37:55,958 INFO L93 Difference]: Finished difference Result 1549 states and 1932 transitions. [2022-04-05 05:37:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 769 states. [2022-04-05 05:37:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 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 775 [2022-04-05 05:37:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:37:55,967 INFO L225 Difference]: With dead ends: 1549 [2022-04-05 05:37:55,967 INFO L226 Difference]: Without dead ends: 1544 [2022-04-05 05:37:56,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2702 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 1534 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368440 ImplicationChecksByTransitivity, 351.2s TimeCoverageRelationStatistics Valid=884353, Invalid=1473407, Unknown=0, NotChecked=0, Total=2357760 [2022-04-05 05:37:56,114 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 1538 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:37:56,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1538 Valid, 38 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-05 05:37:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-04-05 05:37:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2022-04-05 05:37:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1539 states have (on average 1.000649772579597) internal successors, (1540), 1539 states have internal predecessors, (1540), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:37:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1544 transitions. [2022-04-05 05:37:56,156 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1544 transitions. Word has length 775 [2022-04-05 05:37:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:37:56,157 INFO L478 AbstractCegarLoop]: Abstraction has 1544 states and 1544 transitions. [2022-04-05 05:37:56,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 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) [2022-04-05 05:37:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1544 transitions. [2022-04-05 05:37:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1544 [2022-04-05 05:37:56,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:37:56,177 INFO L499 BasicCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:37:56,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 05:37:56,401 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,SelfDestructingSolverStorable9 [2022-04-05 05:37:56,402 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:37:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:37:56,402 INFO L85 PathProgramCache]: Analyzing trace with hash -697320302, now seen corresponding path program 9 times [2022-04-05 05:37:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:37:56,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212687470] [2022-04-05 05:37:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:37:56,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:37:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat