/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:21:33,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:21:33,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:21:33,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:21:33,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:21:33,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:21:33,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:21:33,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:21:33,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:21:33,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:21:33,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:21:33,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:21:33,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:21:33,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:21:33,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:21:33,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:21:33,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:21:33,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:21:33,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:21:33,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:21:33,628 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:21:33,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:21:33,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:21:33,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:21:33,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:21:33,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 22:21:33,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:21:33,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:21:33,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:21:33,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:21:33,689 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:21:33,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:21:33,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:21:33,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:21:33,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:21:33,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:21:33,691 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:21:33,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:21:33,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:21:33,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:21:33,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:21:33,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:21:33,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:21:33,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:21:33,693 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:21:33,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:21:33,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:21:33,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:21:33,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:21:33,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:21:33,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:21:33,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:21:33,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:21:33,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:21:33,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:21:33,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:21:33,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:21:33,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:21:33,696 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:21:33,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:21:33,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:21:33,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:21:33,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:21:33,957 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:21:33,958 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:21:33,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2022-03-18 22:21:34,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8fd5f1f/7ef9b1ed94664bf1a733c903b50f11e4/FLAGc5439dc3a [2022-03-18 22:21:34,415 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:21:34,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2022-03-18 22:21:34,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8fd5f1f/7ef9b1ed94664bf1a733c903b50f11e4/FLAGc5439dc3a [2022-03-18 22:21:34,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8fd5f1f/7ef9b1ed94664bf1a733c903b50f11e4 [2022-03-18 22:21:34,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:21:34,808 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:21:34,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:21:34,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:21:34,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:21:34,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:21:34" (1/1) ... [2022-03-18 22:21:34,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530832e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:34, skipping insertion in model container [2022-03-18 22:21:34,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:21:34" (1/1) ... [2022-03-18 22:21:34,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:21:34,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:21:34,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c[368,381] [2022-03-18 22:21:34,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:21:34,991 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:21:35,003 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c[368,381] [2022-03-18 22:21:35,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:21:35,018 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:21:35,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35 WrapperNode [2022-03-18 22:21:35,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:21:35,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:21:35,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:21:35,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:21:35,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:35,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:35,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:35,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:35,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:35,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:35,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:35,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:21:35,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:21:35,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:21:35,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:21:35,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:35,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:21:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:21:35,076 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) [2022-03-18 22:21:35,078 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 [2022-03-18 22:21:35,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:21:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:21:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:21:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:21:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:21:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:21:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:21:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:21:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:21:35,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:21:35,176 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:21:35,177 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:21:35,287 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:21:35,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:21:35,292 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-18 22:21:35,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:21:35 BoogieIcfgContainer [2022-03-18 22:21:35,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:21:35,294 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:21:35,295 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:21:35,296 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:21:35,298 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:21:35" (1/1) ... [2022-03-18 22:21:37,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:21:37 BasicIcfg [2022-03-18 22:21:37,028 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:21:37,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:21:37,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:21:37,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:21:37,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:21:34" (1/4) ... [2022-03-18 22:21:37,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b96a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:21:37, skipping insertion in model container [2022-03-18 22:21:37,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:21:35" (2/4) ... [2022-03-18 22:21:37,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b96a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:21:37, skipping insertion in model container [2022-03-18 22:21:37,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:21:35" (3/4) ... [2022-03-18 22:21:37,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b96a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:21:37, skipping insertion in model container [2022-03-18 22:21:37,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:21:37" (4/4) ... [2022-03-18 22:21:37,035 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.cqvasr [2022-03-18 22:21:37,040 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:21:37,040 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:21:37,085 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:21:37,095 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 [2022-03-18 22:21:37,095 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:21:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-03-18 22:21:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 22:21:37,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:21:37,119 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:21:37,120 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:21:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:21:37,128 INFO L85 PathProgramCache]: Analyzing trace with hash 702671213, now seen corresponding path program 1 times [2022-03-18 22:21:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:21:37,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849526889] [2022-03-18 22:21:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:37,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:21:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:37,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:21:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:37,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:21:37,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849526889] [2022-03-18 22:21:37,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849526889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:21:37,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:21:37,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 22:21:37,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850451978] [2022-03-18 22:21:37,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:21:37,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 22:21:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:21:37,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 22:21:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:21:37,344 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-03-18 22:21:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:21:37,391 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-03-18 22:21:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 22:21:37,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-03-18 22:21:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:21:37,404 INFO L225 Difference]: With dead ends: 41 [2022-03-18 22:21:37,405 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 22:21:37,408 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 [2022-03-18 22:21:37,412 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:21:37,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:21:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 22:21:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 22:21:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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) [2022-03-18 22:21:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-03-18 22:21:37,444 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-03-18 22:21:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:21:37,445 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-03-18 22:21:37,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-03-18 22:21:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-03-18 22:21:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 22:21:37,447 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:21:37,447 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:21:37,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:21:37,447 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:21:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:21:37,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1128942900, now seen corresponding path program 1 times [2022-03-18 22:21:37,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:21:37,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701158378] [2022-03-18 22:21:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:37,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:21:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:37,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:21:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:21:37,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701158378] [2022-03-18 22:21:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701158378] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:21:37,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:21:37,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 22:21:37,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410898756] [2022-03-18 22:21:37,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:21:37,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 22:21:37,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:21:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 22:21:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:21:37,674 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-18 22:21:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:21:37,765 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-03-18 22:21:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 22:21:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-03-18 22:21:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:21:37,767 INFO L225 Difference]: With dead ends: 28 [2022-03-18 22:21:37,767 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 22:21:37,772 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 22:21:37,773 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:21:37,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:21:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 22:21:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 22:21:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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) [2022-03-18 22:21:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-03-18 22:21:37,785 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2022-03-18 22:21:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:21:37,786 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-03-18 22:21:37,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-18 22:21:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-03-18 22:21:37,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 22:21:37,787 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:21:37,787 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:21:37,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 22:21:37,787 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:21:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:21:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash -610770875, now seen corresponding path program 1 times [2022-03-18 22:21:37,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:21:37,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230780993] [2022-03-18 22:21:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:37,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:21:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:38,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:21:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:21:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230780993] [2022-03-18 22:21:38,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230780993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:21:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107886817] [2022-03-18 22:21:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:38,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:21:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:21:38,095 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) [2022-03-18 22:21:38,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:21:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:38,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 22:21:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:21:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:38,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:21:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:39,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107886817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:21:39,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:21:39,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 22:21:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973393854] [2022-03-18 22:21:39,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:21:39,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 22:21:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:21:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 22:21:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-18 22:21:39,026 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 3 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) [2022-03-18 22:21:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:21:40,882 INFO L93 Difference]: Finished difference Result 48 states and 70 transitions. [2022-03-18 22:21:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 22:21:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 22:21:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:21:40,888 INFO L225 Difference]: With dead ends: 48 [2022-03-18 22:21:40,888 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 22:21:40,889 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 22:21:40,890 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:21:40,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 37 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 22:21:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 22:21:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2022-03-18 22:21:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2022-03-18 22:21:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-03-18 22:21:40,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 17 [2022-03-18 22:21:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:21:40,902 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-03-18 22:21:40,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 3 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) [2022-03-18 22:21:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-03-18 22:21:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 22:21:40,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:21:40,905 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:21:40,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 22:21:41,125 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 [2022-03-18 22:21:41,125 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:21:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:21:41,126 INFO L85 PathProgramCache]: Analyzing trace with hash 162216202, now seen corresponding path program 1 times [2022-03-18 22:21:41,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:21:41,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601898312] [2022-03-18 22:21:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:41,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:21:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:41,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:21:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:41,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:21:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601898312] [2022-03-18 22:21:41,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601898312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:21:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712782152] [2022-03-18 22:21:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:41,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:21:41,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:21:41,257 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) [2022-03-18 22:21:41,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:21:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 22:21:41,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:21:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:21:41,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 22:21:41,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712782152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:21:41,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 22:21:41,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 13 [2022-03-18 22:21:41,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081264500] [2022-03-18 22:21:41,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:21:41,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 22:21:41,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:21:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 22:21:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-18 22:21:41,445 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:21:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:21:41,493 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-03-18 22:21:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 22:21:41,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 17 [2022-03-18 22:21:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:21:41,497 INFO L225 Difference]: With dead ends: 35 [2022-03-18 22:21:41,497 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 22:21:41,498 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 22:21:41,500 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:21:41,501 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 78 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:21:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 22:21:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-03-18 22:21:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-03-18 22:21:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-03-18 22:21:41,514 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2022-03-18 22:21:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:21:41,514 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-03-18 22:21:41,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:21:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-03-18 22:21:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 22:21:41,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:21:41,515 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:21:41,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:21:41,731 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 [2022-03-18 22:21:41,732 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:21:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:21:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash 760455623, now seen corresponding path program 1 times [2022-03-18 22:21:41,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:21:41,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823517422] [2022-03-18 22:21:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:41,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:21:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:42,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:21:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:42,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:21:42,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823517422] [2022-03-18 22:21:42,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823517422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:21:42,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699629374] [2022-03-18 22:21:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:42,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:21:42,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:21:42,044 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) [2022-03-18 22:21:42,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:21:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:42,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 22:21:42,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:21:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:42,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:21:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:46,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699629374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:21:46,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:21:46,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-03-18 22:21:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801840053] [2022-03-18 22:21:46,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:21:46,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 22:21:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:21:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 22:21:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-03-18 22:21:46,385 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 3 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) [2022-03-18 22:21:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:21:54,940 INFO L93 Difference]: Finished difference Result 60 states and 85 transitions. [2022-03-18 22:21:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 22:21:54,941 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 3 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 18 [2022-03-18 22:21:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:21:54,942 INFO L225 Difference]: With dead ends: 60 [2022-03-18 22:21:54,942 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 22:21:54,943 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=498, Invalid=2154, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 22:21:54,944 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:21:54,944 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 56 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 22:21:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 22:21:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-03-18 22:21:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2022-03-18 22:21:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-03-18 22:21:54,952 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 18 [2022-03-18 22:21:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:21:54,952 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-03-18 22:21:54,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 3 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) [2022-03-18 22:21:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-03-18 22:21:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 22:21:54,953 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:21:54,953 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:21:54,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:21:55,158 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 [2022-03-18 22:21:55,158 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:21:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:21:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1618157770, now seen corresponding path program 1 times [2022-03-18 22:21:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:21:55,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764863454] [2022-03-18 22:21:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:55,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:21:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:55,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:21:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:55,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:21:55,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764863454] [2022-03-18 22:21:55,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764863454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:21:55,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205872421] [2022-03-18 22:21:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:55,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:21:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:21:55,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:21:55,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:21:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:55,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 22:21:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:21:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 22:21:55,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:21:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 22:21:55,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205872421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:21:55,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:21:55,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2022-03-18 22:21:55,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496540769] [2022-03-18 22:21:55,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:21:55,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 22:21:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:21:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 22:21:55,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-18 22:21:55,872 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 3 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) [2022-03-18 22:21:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:21:56,263 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-03-18 22:21:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 22:21:56,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 3 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 19 [2022-03-18 22:21:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:21:56,264 INFO L225 Difference]: With dead ends: 39 [2022-03-18 22:21:56,265 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 22:21:56,265 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-03-18 22:21:56,266 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:21:56,266 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 47 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 188 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-03-18 22:21:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 22:21:56,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2022-03-18 22:21:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-03-18 22:21:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-18 22:21:56,282 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 19 [2022-03-18 22:21:56,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:21:56,283 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-18 22:21:56,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 3 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) [2022-03-18 22:21:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-18 22:21:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 22:21:56,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:21:56,283 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:21:56,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 22:21:56,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:21:56,488 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:21:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:21:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1349996025, now seen corresponding path program 1 times [2022-03-18 22:21:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:21:56,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994957384] [2022-03-18 22:21:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:56,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:21:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:56,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:21:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:21:56,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:21:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994957384] [2022-03-18 22:21:56,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994957384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:21:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595278167] [2022-03-18 22:21:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:21:56,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:21:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:21:56,868 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:21:56,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:21:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:21:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 22:21:56,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:22:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 22:22:01,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:22:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:22:02,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595278167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:22:02,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:22:02,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 30 [2022-03-18 22:22:02,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795414844] [2022-03-18 22:22:02,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:22:02,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 22:22:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:22:02,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 22:22:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=717, Unknown=2, NotChecked=0, Total=870 [2022-03-18 22:22:02,451 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 30 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 3 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) [2022-03-18 22:22:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:22:03,796 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2022-03-18 22:22:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 22:22:03,796 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 3 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 [2022-03-18 22:22:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:22:03,796 INFO L225 Difference]: With dead ends: 33 [2022-03-18 22:22:03,796 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 22:22:03,797 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=420, Invalid=1648, Unknown=2, NotChecked=0, Total=2070 [2022-03-18 22:22:03,798 INFO L912 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 22:22:03,798 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 70 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 196 Invalid, 0 Unknown, 19 Unchecked, 0.6s Time] [2022-03-18 22:22:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 22:22:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 22:22:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 22:22:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 22:22:03,799 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-03-18 22:22:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:22:03,800 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 22:22:03,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 3 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) [2022-03-18 22:22:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 22:22:03,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 22:22:03,802 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 22:22:03,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:22:04,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:22:04,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 22:22:05,155 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 22:22:05,155 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 22:22:05,155 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 22:22:05,155 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 22:22:05,155 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 22:22:05,156 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 12 49) the Hoare annotation is: true [2022-03-18 22:22:05,156 INFO L878 garLoopResultBuilder]: At program point L16-2(lines 16 20) the Hoare annotation is: (or (and (<= (+ (div main_~y~0 4294967296) (div (+ main_~x~0 1) 4294967296)) (div main_~n~0 4294967296)) (= main_~n~0 (+ main_~y~0 main_~x~0))) (and (= main_~n~0 main_~x~0) (= main_~y~0 0))) [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point L16-3(lines 16 20) no Hoare annotation was computed. [2022-03-18 22:22:05,156 INFO L878 garLoopResultBuilder]: At program point L23-2(lines 23 27) the Hoare annotation is: (let ((.cse4 (div main_~n~0 4294967296)) (.cse2 (* (- 1) main_~z~0)) (.cse3 (* (- 1) main_~x~0))) (let ((.cse0 (<= (+ .cse4 (div (+ main_~n~0 .cse2 .cse3) (- 4294967296))) (+ (div (+ main_~z~0 main_~x~0 (- 4294967296)) 4294967296) 1))) (.cse1 (< (div (+ (- 1) .cse2 .cse3) (- 4294967296)) (+ (div (+ main_~z~0 main_~x~0 (* (- 1) main_~n~0)) 4294967296) .cse4 2)))) (or (and (<= main_~n~0 (+ main_~y~0 (* 4294967296 (div main_~x~0 4294967296)))) .cse0 .cse1 (= main_~n~0 (+ main_~y~0 main_~x~0))) (and (not (< 0 (mod (+ main_~n~0 (* main_~y~0 4294967295)) 4294967296))) (<= (* (div (+ main_~z~0 1) 4294967296) 4294967296) main_~z~0) .cse0 .cse1)))) [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point L29-1(lines 13 49) no Hoare annotation was computed. [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 13 49) no Hoare annotation was computed. [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point L41-1(lines 13 49) no Hoare annotation was computed. [2022-03-18 22:22:05,156 INFO L878 garLoopResultBuilder]: At program point L41-2(lines 41 45) the Hoare annotation is: (or (= main_~n~0 main_~x~0) (and (not (< 0 (mod main_~x~0 4294967296))) (not (< 0 (mod main_~n~0 4294967296)))) (let ((.cse2 (div main_~n~0 4294967296))) (let ((.cse1 (+ main_~n~0 (* 4294967296 (div main_~x~0 4294967296)))) (.cse0 (* .cse2 4294967296)) (.cse3 (* (- 1) main_~z~0)) (.cse4 (* (- 1) main_~x~0))) (and (<= (+ main_~x~0 .cse0) .cse1) (<= (+ .cse2 (div (+ main_~n~0 .cse3 .cse4) (- 4294967296))) (+ (div (+ main_~z~0 main_~x~0 (- 4294967296)) 4294967296) 1)) (< .cse1 (+ main_~x~0 .cse0 1)) (< (div (+ (- 1) .cse3 .cse4) (- 4294967296)) (+ (div (+ main_~z~0 main_~x~0 (* (- 1) main_~n~0)) 4294967296) .cse2 2)))))) [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point L47(line 47) no Hoare annotation was computed. [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 12 49) no Hoare annotation was computed. [2022-03-18 22:22:05,156 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 12 49) no Hoare annotation was computed. [2022-03-18 22:22:05,157 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-03-18 22:22:05,157 INFO L882 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-03-18 22:22:05,157 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-18 22:22:05,157 INFO L882 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2022-03-18 22:22:05,157 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-03-18 22:22:05,157 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2022-03-18 22:22:05,160 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:22:05,161 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 22:22:05,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:22:05 BasicIcfg [2022-03-18 22:22:05,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 22:22:05,175 INFO L158 Benchmark]: Toolchain (without parser) took 30367.50ms. Allocated memory was 166.7MB in the beginning and 210.8MB in the end (delta: 44.0MB). Free memory was 108.1MB in the beginning and 105.9MB in the end (delta: 2.3MB). Peak memory consumption was 92.4MB. Max. memory is 8.0GB. [2022-03-18 22:22:05,175 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 166.7MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 22:22:05,176 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.25ms. Allocated memory was 166.7MB in the beginning and 210.8MB in the end (delta: 44.0MB). Free memory was 107.9MB in the beginning and 183.9MB in the end (delta: -76.0MB). Peak memory consumption was 9.3MB. Max. memory is 8.0GB. [2022-03-18 22:22:05,176 INFO L158 Benchmark]: Boogie Preprocessor took 26.57ms. Allocated memory is still 210.8MB. Free memory was 183.4MB in the beginning and 182.3MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 22:22:05,176 INFO L158 Benchmark]: RCFGBuilder took 246.52ms. Allocated memory is still 210.8MB. Free memory was 182.3MB in the beginning and 170.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 22:22:05,176 INFO L158 Benchmark]: IcfgTransformer took 1733.80ms. Allocated memory is still 210.8MB. Free memory was 170.8MB in the beginning and 128.9MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2022-03-18 22:22:05,177 INFO L158 Benchmark]: TraceAbstraction took 28144.98ms. Allocated memory is still 210.8MB. Free memory was 128.4MB in the beginning and 105.9MB in the end (delta: 22.5MB). Peak memory consumption was 68.9MB. Max. memory is 8.0GB. [2022-03-18 22:22:05,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 166.7MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.25ms. Allocated memory was 166.7MB in the beginning and 210.8MB in the end (delta: 44.0MB). Free memory was 107.9MB in the beginning and 183.9MB in the end (delta: -76.0MB). Peak memory consumption was 9.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.57ms. Allocated memory is still 210.8MB. Free memory was 183.4MB in the beginning and 182.3MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 246.52ms. Allocated memory is still 210.8MB. Free memory was 182.3MB in the beginning and 170.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 1733.80ms. Allocated memory is still 210.8MB. Free memory was 170.8MB in the beginning and 128.9MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. * TraceAbstraction took 28144.98ms. Allocated memory is still 210.8MB. Free memory was 128.4MB in the beginning and 105.9MB in the end (delta: 22.5MB). Peak memory consumption was 68.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.1s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 371 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 370 mSDsluCounter, 343 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 260 mSDsCounter, 346 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 853 IncrementalHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 346 mSolverCounterUnsat, 91 mSDtfsCounter, 853 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 321 GetRequests, 122 SyntacticMatches, 22 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=4, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 45 NumberOfFragments, 264 HoareAnnotationTreeSize, 23 FomulaSimplifications, 123 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 5114 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 12.6s InterpolantComputationTime, 214 NumberOfCodeBlocks, 214 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 272 ConstructedInterpolants, 4 QuantifiedInterpolants, 3198 SizeOfPredicates, 19 NumberOfNonLiveVariables, 393 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 11/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (y / 4294967296 + (x + 1) / 4294967296 <= n / 4294967296 && n == y + x) || (n == x && y == 0) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((n <= y + 4294967296 * (x / 4294967296) && n / 4294967296 + (n + -1 * z + -1 * x) / -4294967296 <= (z + x + -4294967296) / 4294967296 + 1) && (-1 + -1 * z + -1 * x) / -4294967296 < (z + x + -1 * n) / 4294967296 + n / 4294967296 + 2) && n == y + x) || (((!(0 < (n + y * 4294967295) % 4294967296) && (z + 1) / 4294967296 * 4294967296 <= z) && n / 4294967296 + (n + -1 * z + -1 * x) / -4294967296 <= (z + x + -4294967296) / 4294967296 + 1) && (-1 + -1 * z + -1 * x) / -4294967296 < (z + x + -1 * n) / 4294967296 + n / 4294967296 + 2) RESULT: Ultimate proved your program to be correct! [2022-03-18 22:22:05,314 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...