/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:20:41,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:20:41,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:20:41,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:20:41,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:20:41,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:20:41,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:20:41,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:20:41,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:20:41,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:20:41,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:20:41,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:20:41,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:20:41,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:20:41,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:20:41,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:20:41,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:20:41,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:20:41,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:20:41,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:20:41,692 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:20:41,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:20:41,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:20:41,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:20:41,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:20:41,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 19:20:41,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:20:41,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:20:41,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:20:41,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:20:41,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:20:41,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:20:41,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:20:41,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:20:41,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:20:41,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:20:41,730 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:20:41,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:20:41,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:20:41,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:20:41,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:20:41,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:20:41,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:20:41,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:20:41,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:20:41,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:20:41,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:20:41,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:20:41,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:20:41,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:20:41,733 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:20:41,733 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:20:41,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:20:41,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:20:41,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:20:41,946 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:20:41,947 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:20:41,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2022-03-17 19:20:42,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fba38c11/0c68e487d8f249ae82ee2f7c7143f060/FLAG445b87f00 [2022-03-17 19:20:42,386 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:20:42,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2022-03-17 19:20:42,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fba38c11/0c68e487d8f249ae82ee2f7c7143f060/FLAG445b87f00 [2022-03-17 19:20:42,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fba38c11/0c68e487d8f249ae82ee2f7c7143f060 [2022-03-17 19:20:42,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:20:42,406 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:20:42,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:20:42,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:20:42,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:20:42,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7902424c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42, skipping insertion in model container [2022-03-17 19:20:42,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:20:42,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:20:42,542 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i[808,821] [2022-03-17 19:20:42,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:20:42,561 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:20:42,570 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i[808,821] [2022-03-17 19:20:42,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:20:42,582 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:20:42,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42 WrapperNode [2022-03-17 19:20:42,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:20:42,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:20:42,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:20:42,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:20:42,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:20:42,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:20:42,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:20:42,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:20:42,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:20:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:42,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 19:20:42,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 19:20:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:20:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:20:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:20:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:20:42,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:20:42,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:20:42,663 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:20:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 19:20:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 19:20:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:20:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:20:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:20:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 19:20:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:20:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:20:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:20:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:20:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:20:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:20:42,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:20:42,714 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:20:42,715 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:20:42,826 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:20:42,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:20:42,851 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 19:20:42,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:42 BoogieIcfgContainer [2022-03-17 19:20:42,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:20:42,853 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:20:42,853 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:20:42,867 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:20:42,869 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:42" (1/1) ... [2022-03-17 19:20:42,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:20:42 BasicIcfg [2022-03-17 19:20:42,878 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:20:42,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:20:42,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:20:42,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:20:42,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:20:42" (1/4) ... [2022-03-17 19:20:42,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d2a132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:20:42, skipping insertion in model container [2022-03-17 19:20:42,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:42" (2/4) ... [2022-03-17 19:20:42,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d2a132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:20:42, skipping insertion in model container [2022-03-17 19:20:42,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:42" (3/4) ... [2022-03-17 19:20:42,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d2a132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:20:42, skipping insertion in model container [2022-03-17 19:20:42,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:20:42" (4/4) ... [2022-03-17 19:20:42,893 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.iqvasr [2022-03-17 19:20:42,897 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:20:42,897 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:20:42,956 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:20:42,964 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 19:20:42,964 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:20:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:20:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:20:42,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:42,989 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:42,990 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash -423489079, now seen corresponding path program 1 times [2022-03-17 19:20:43,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:43,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052269885] [2022-03-17 19:20:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:43,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:43,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:43,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052269885] [2022-03-17 19:20:43,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052269885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:20:43,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:20:43,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 19:20:43,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644443033] [2022-03-17 19:20:43,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:20:43,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:20:43,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:20:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:20:43,197 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:43,235 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-17 19:20:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:20:43,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 19:20:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:43,244 INFO L225 Difference]: With dead ends: 31 [2022-03-17 19:20:43,244 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 19:20:43,247 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:20:43,250 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:43,251 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:20:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 19:20:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 19:20:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 19:20:43,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 19:20:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:43,288 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 19:20:43,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 19:20:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:20:43,289 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:43,290 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:43,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:20:43,291 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:43,294 INFO L85 PathProgramCache]: Analyzing trace with hash -422565558, now seen corresponding path program 1 times [2022-03-17 19:20:43,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:43,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486680043] [2022-03-17 19:20:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:43,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:43,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:43,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:43,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486680043] [2022-03-17 19:20:43,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486680043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:20:43,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:20:43,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 19:20:43,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302918286] [2022-03-17 19:20:43,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:20:43,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 19:20:43,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 19:20:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 19:20:43,409 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:43,505 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-17 19:20:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:20:43,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 19:20:43,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:43,506 INFO L225 Difference]: With dead ends: 22 [2022-03-17 19:20:43,507 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 19:20:43,510 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-17 19:20:43,512 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:43,512 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:20:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 19:20:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-17 19:20:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-17 19:20:43,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-03-17 19:20:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:43,518 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-17 19:20:43,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-17 19:20:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 19:20:43,520 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:43,520 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:43,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:20:43,521 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1744981802, now seen corresponding path program 1 times [2022-03-17 19:20:43,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:43,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631469120] [2022-03-17 19:20:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:43,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631469120] [2022-03-17 19:20:43,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631469120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:20:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723352895] [2022-03-17 19:20:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:43,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:43,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:20:43,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:20:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:43,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 19:20:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:20:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:43,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:20:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:44,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723352895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:20:44,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:20:44,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-17 19:20:44,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80964407] [2022-03-17 19:20:44,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:20:44,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 19:20:44,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:44,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 19:20:44,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-17 19:20:44,185 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:44,444 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-03-17 19:20:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 19:20:44,445 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-17 19:20:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:44,445 INFO L225 Difference]: With dead ends: 37 [2022-03-17 19:20:44,445 INFO L226 Difference]: Without dead ends: 22 [2022-03-17 19:20:44,446 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-03-17 19:20:44,446 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:44,447 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 41 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:20:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-17 19:20:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-17 19:20:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-17 19:20:44,450 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-17 19:20:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:44,451 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-17 19:20:44,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-17 19:20:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 19:20:44,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:44,451 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:44,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 19:20:44,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:44,687 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1411179434, now seen corresponding path program 2 times [2022-03-17 19:20:44,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:44,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858118684] [2022-03-17 19:20:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:44,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:44,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 19:20:44,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:44,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858118684] [2022-03-17 19:20:44,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858118684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:20:44,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462042373] [2022-03-17 19:20:44,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:20:44,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:44,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:44,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:20:44,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:20:44,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:20:44,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:20:44,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 19:20:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:20:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:45,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:20:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:45,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462042373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:20:45,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:20:45,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-17 19:20:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632686554] [2022-03-17 19:20:45,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:20:45,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 19:20:45,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 19:20:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-03-17 19:20:45,566 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:46,051 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-03-17 19:20:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 19:20:46,051 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-17 19:20:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:46,052 INFO L225 Difference]: With dead ends: 42 [2022-03-17 19:20:46,052 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 19:20:46,053 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=2083, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 19:20:46,054 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:46,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:20:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 19:20:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-03-17 19:20:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-17 19:20:46,058 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-03-17 19:20:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:46,059 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-17 19:20:46,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-17 19:20:46,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 19:20:46,059 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:46,059 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:46,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:20:46,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 19:20:46,272 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1657807639, now seen corresponding path program 1 times [2022-03-17 19:20:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:46,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684450044] [2022-03-17 19:20:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:46,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:46,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:46,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:46,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684450044] [2022-03-17 19:20:46,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684450044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:20:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878052775] [2022-03-17 19:20:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:46,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:46,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:46,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:20:46,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:20:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:46,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 19:20:46,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:20:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:46,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:20:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:46,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878052775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:20:46,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:20:46,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-03-17 19:20:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808722010] [2022-03-17 19:20:46,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:20:46,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 19:20:46,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:46,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 19:20:46,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-17 19:20:46,459 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:46,561 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-17 19:20:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 19:20:46,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-17 19:20:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:46,563 INFO L225 Difference]: With dead ends: 52 [2022-03-17 19:20:46,563 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 19:20:46,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:20:46,564 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:46,564 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:20:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 19:20:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-17 19:20:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-03-17 19:20:46,568 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 26 [2022-03-17 19:20:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:46,569 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-03-17 19:20:46,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-03-17 19:20:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 19:20:46,569 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:46,570 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:46,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 19:20:46,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:46,785 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2063074549, now seen corresponding path program 2 times [2022-03-17 19:20:46,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:46,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066010663] [2022-03-17 19:20:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:46,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 19:20:46,815 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 19:20:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 19:20:46,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 19:20:46,847 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 19:20:46,847 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 19:20:46,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-17 19:20:46,850 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-03-17 19:20:46,852 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 19:20:46,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:20:46 BasicIcfg [2022-03-17 19:20:46,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 19:20:46,868 INFO L158 Benchmark]: Toolchain (without parser) took 4461.27ms. Allocated memory was 199.2MB in the beginning and 261.1MB in the end (delta: 61.9MB). Free memory was 148.9MB in the beginning and 172.5MB in the end (delta: -23.6MB). Peak memory consumption was 39.3MB. Max. memory is 8.0GB. [2022-03-17 19:20:46,868 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 199.2MB. Free memory was 165.2MB in the beginning and 165.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 19:20:46,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.01ms. Allocated memory is still 199.2MB. Free memory was 148.7MB in the beginning and 176.8MB in the end (delta: -28.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-17 19:20:46,868 INFO L158 Benchmark]: Boogie Preprocessor took 26.14ms. Allocated memory is still 199.2MB. Free memory was 176.8MB in the beginning and 175.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:20:46,868 INFO L158 Benchmark]: RCFGBuilder took 240.39ms. Allocated memory is still 199.2MB. Free memory was 175.2MB in the beginning and 165.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 19:20:46,868 INFO L158 Benchmark]: IcfgTransformer took 25.66ms. Allocated memory is still 199.2MB. Free memory was 165.3MB in the beginning and 164.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:20:46,869 INFO L158 Benchmark]: TraceAbstraction took 3987.78ms. Allocated memory was 199.2MB in the beginning and 261.1MB in the end (delta: 61.9MB). Free memory was 163.7MB in the beginning and 172.5MB in the end (delta: -8.7MB). Peak memory consumption was 54.1MB. Max. memory is 8.0GB. [2022-03-17 19:20:46,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 199.2MB. Free memory was 165.2MB in the beginning and 165.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.01ms. Allocated memory is still 199.2MB. Free memory was 148.7MB in the beginning and 176.8MB in the end (delta: -28.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.14ms. Allocated memory is still 199.2MB. Free memory was 176.8MB in the beginning and 175.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 240.39ms. Allocated memory is still 199.2MB. Free memory was 175.2MB in the beginning and 165.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 25.66ms. Allocated memory is still 199.2MB. Free memory was 165.3MB in the beginning and 164.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3987.78ms. Allocated memory was 199.2MB in the beginning and 261.1MB in the end (delta: 61.9MB). Free memory was 163.7MB in the beginning and 172.5MB in the end (delta: -8.7MB). Peak memory consumption was 54.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=10, n=0] [L24] COND TRUE i<=n VAL [i=1, n=0, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=2, n=10] [L24] i++ VAL [i=2, n=2, n=10] [L24] COND TRUE i<=n VAL [i=2, n=2, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=4, n=10] [L24] i++ VAL [i=3, n=4, n=10] [L24] COND TRUE i<=n VAL [i=3, n=4, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=6, n=10] [L24] i++ VAL [i=4, n=10, n=6] [L24] COND TRUE i<=n VAL [i=4, n=10, n=6] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=10, n=8] [L24] i++ VAL [i=5, n=8, n=10] [L24] COND TRUE i<=n VAL [i=5, n=10, n=8] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=12, n=10] [L24] i++ VAL [i=7, n=10, n=12] [L24] COND TRUE i<=n VAL [i=7, n=10, n=12] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=14, n=10] [L24] i++ VAL [i=8, n=10, n=14] [L24] COND TRUE i<=n VAL [i=8, n=10, n=14] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=10, n=16] [L24] i++ VAL [i=9, n=10, n=16] [L24] COND TRUE i<=n VAL [i=9, n=10, n=16] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=18, n=10] [L24] i++ VAL [i=10, n=10, n=18] [L24] COND TRUE i<=n VAL [i=10, n=10, n=18] [L25] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L24] i++ VAL [i=11, n=18, n=10] [L24] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.9s, OverallIterations: 6, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 142 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 141 mSDsluCounter, 213 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 151 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 466 IncrementalHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 62 mSDtfsCounter, 466 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 205 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 191 ConstructedInterpolants, 0 QuantifiedInterpolants, 1066 SizeOfPredicates, 6 NumberOfNonLiveVariables, 205 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 28/144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-17 19:20:46,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...