/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/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:56:50,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:56:50,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:56:50,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 05:56:50,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:56:50,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:56:50,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:56:50,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:56:50,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:56:50,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:56:50,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:56:50,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:56:50,363 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:56:50,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:56:50,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:56:50,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:56:50,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:56:50,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:56:50,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:56:50,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:56:50,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:56:50,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:56:50,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:56:50,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:56:50,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:56:50,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:56:50,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:56:50,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:56:50,415 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:56:50,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:56:50,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:56:50,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:56:50,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:56:50,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:56:50,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:56:50,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:56:50,417 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:56:50,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:56:50,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:56:50,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:56:50,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:56:50,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:56:50,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:56:50,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:56:50,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:56:50,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:56:50,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:56:50,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:56:50,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:56:50,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:56:50,419 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:56:50,419 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:56:50,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:56:50,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:56:50,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:56:50,617 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:56:50,618 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:56:50,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-04-05 05:56:50,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c94056d16/1df95eb0afd54147a5bfea87db247715/FLAG41044c3f3 [2022-04-05 05:56:51,038 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:56:51,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-04-05 05:56:51,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c94056d16/1df95eb0afd54147a5bfea87db247715/FLAG41044c3f3 [2022-04-05 05:56:51,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c94056d16/1df95eb0afd54147a5bfea87db247715 [2022-04-05 05:56:51,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:56:51,464 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:56:51,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:56:51,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:56:51,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:56:51,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63222f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51, skipping insertion in model container [2022-04-05 05:56:51,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:56:51,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:56:51,604 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/loopv3.c[456,469] [2022-04-05 05:56:51,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:56:51,625 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:56:51,637 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/loopv3.c[456,469] [2022-04-05 05:56:51,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:56:51,663 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:56:51,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51 WrapperNode [2022-04-05 05:56:51,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:56:51,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:56:51,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:56:51,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:56:51,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:56:51,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:56:51,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:56:51,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:56:51,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:56:51,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:56:51,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 05:56:51,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 05:56:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:56:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:56:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:56:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 05:56:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:56:51,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:56:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 05:56:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:56:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:56:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:56:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:56:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 05:56:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:56:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:56:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:56:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:56:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:56:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:56:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:56:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:56:51,811 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:56:51,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:56:51,892 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:56:51,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:56:51,898 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 05:56:51,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:56:51 BoogieIcfgContainer [2022-04-05 05:56:51,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:56:51,900 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:56:51,900 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:56:51,901 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:56:51,904 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:56:51" (1/1) ... [2022-04-05 05:56:51,905 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:56:51,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:56:51 BasicIcfg [2022-04-05 05:56:51,920 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:56:51,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:56:51,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:56:51,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:56:51,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:56:51" (1/4) ... [2022-04-05 05:56:51,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afc5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:56:51, skipping insertion in model container [2022-04-05 05:56:51,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:51" (2/4) ... [2022-04-05 05:56:51,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afc5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:56:51, skipping insertion in model container [2022-04-05 05:56:51,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:56:51" (3/4) ... [2022-04-05 05:56:51,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afc5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:56:51, skipping insertion in model container [2022-04-05 05:56:51,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:56:51" (4/4) ... [2022-04-05 05:56:51,932 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.cqvasr [2022-04-05 05:56:51,936 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:56:51,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:56:51,976 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:56:51,981 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 05:56:51,981 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:56:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 05:56:51,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:56:51,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:56:51,997 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:56:51,998 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:56:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:56:52,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1479494173, now seen corresponding path program 1 times [2022-04-05 05:56:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:56:52,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515140285] [2022-04-05 05:56:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:56:52,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:56:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:52,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:56:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:52,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:56:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515140285] [2022-04-05 05:56:52,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515140285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:56:52,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:56:52,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:56:52,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462247155] [2022-04-05 05:56:52,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:56:52,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:56:52,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:56:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:56:52,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:56:52,230 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:56:52,260 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-05 05:56:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:56:52,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 05:56:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:56:52,267 INFO L225 Difference]: With dead ends: 34 [2022-04-05 05:56:52,267 INFO L226 Difference]: Without dead ends: 14 [2022-04-05 05:56:52,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:56:52,273 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:56:52,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:56:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-05 05:56:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-05 05:56:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-05 05:56:52,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2022-04-05 05:56:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:56:52,302 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-05 05:56:52,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-05 05:56:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:56:52,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:56:52,303 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:56:52,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:56:52,304 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:56:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:56:52,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1508123324, now seen corresponding path program 1 times [2022-04-05 05:56:52,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:56:52,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284804056] [2022-04-05 05:56:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:56:52,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:56:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:52,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:56:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:52,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:56:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284804056] [2022-04-05 05:56:52,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284804056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:56:52,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:56:52,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:56:52,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109360295] [2022-04-05 05:56:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:56:52,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 05:56:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:56:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 05:56:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:56:52,422 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:56:52,487 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-04-05 05:56:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 05:56:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 12 [2022-04-05 05:56:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:56:52,491 INFO L225 Difference]: With dead ends: 22 [2022-04-05 05:56:52,491 INFO L226 Difference]: Without dead ends: 16 [2022-04-05 05:56:52,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:56:52,493 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:56:52,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 14 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:56:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-05 05:56:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-04-05 05:56:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-05 05:56:52,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-04-05 05:56:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:56:52,500 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-05 05:56:52,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-05 05:56:52,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 05:56:52,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:56:52,501 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:56:52,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:56:52,501 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:56:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:56:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash 89998238, now seen corresponding path program 1 times [2022-04-05 05:56:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:56:52,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535473933] [2022-04-05 05:56:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:56:52,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:56:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:52,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:56:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:52,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:56:52,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535473933] [2022-04-05 05:56:52,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535473933] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:56:52,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422662812] [2022-04-05 05:56:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:56:52,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:56:52,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:56:52,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:56:52,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:56:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 05:56:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:56:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:52,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:56:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:52,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422662812] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:56:52,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:56:52,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-05 05:56:52,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024644874] [2022-04-05 05:56:52,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:56:52,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 05:56:52,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:56:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 05:56:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-05 05:56:52,849 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 05:56:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:56:53,000 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-04-05 05:56:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 05:56:53,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-04-05 05:56:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:56:53,002 INFO L225 Difference]: With dead ends: 27 [2022-04-05 05:56:53,002 INFO L226 Difference]: Without dead ends: 21 [2022-04-05 05:56:53,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:56:53,007 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:56:53,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 18 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:56:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-05 05:56:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-05 05:56:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-04-05 05:56:53,019 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2022-04-05 05:56:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:56:53,020 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-04-05 05:56:53,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 05:56:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-04-05 05:56:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 05:56:53,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:56:53,021 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:56:53,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:56:53,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:56:53,228 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:56:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:56:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1261632700, now seen corresponding path program 2 times [2022-04-05 05:56:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:56:53,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249532730] [2022-04-05 05:56:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:56:53,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:56:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:53,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:56:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:53,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:56:53,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249532730] [2022-04-05 05:56:53,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249532730] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:56:53,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526216557] [2022-04-05 05:56:53,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:56:53,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:56:53,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:56:53,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:56:53,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:56:53,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:56:53,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:56:53,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 05:56:53,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:56:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:53,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:56:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:53,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526216557] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:56:53,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:56:53,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-04-05 05:56:53,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169159887] [2022-04-05 05:56:53,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:56:53,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 05:56:53,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:56:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 05:56:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-04-05 05:56:53,656 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 05:56:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:56:53,936 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-04-05 05:56:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 05:56:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-04-05 05:56:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:56:53,939 INFO L225 Difference]: With dead ends: 39 [2022-04-05 05:56:53,939 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 05:56:53,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2022-04-05 05:56:53,942 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:56:53,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:56:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 05:56:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-05 05:56:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-04-05 05:56:53,957 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2022-04-05 05:56:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:56:53,957 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-04-05 05:56:53,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 05:56:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-04-05 05:56:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 05:56:53,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:56:53,963 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:56:53,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:56:54,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-05 05:56:54,164 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:56:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:56:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1413178640, now seen corresponding path program 3 times [2022-04-05 05:56:54,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:56:54,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95019984] [2022-04-05 05:56:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:56:54,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:56:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:54,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:56:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:54,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:56:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95019984] [2022-04-05 05:56:54,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95019984] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:56:54,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426012141] [2022-04-05 05:56:54,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:56:54,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:56:54,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:56:54,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:56:54,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:56:54,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-05 05:56:54,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:56:54,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 05:56:54,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:56:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:54,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:56:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:54,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426012141] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:56:54,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:56:54,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2022-04-05 05:56:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888195600] [2022-04-05 05:56:54,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:56:54,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-05 05:56:54,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:56:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-05 05:56:54,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=825, Unknown=0, NotChecked=0, Total=1406 [2022-04-05 05:56:54,902 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 05:56:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:56:55,483 INFO L93 Difference]: Finished difference Result 63 states and 96 transitions. [2022-04-05 05:56:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 05:56:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-04-05 05:56:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:56:55,484 INFO L225 Difference]: With dead ends: 63 [2022-04-05 05:56:55,484 INFO L226 Difference]: Without dead ends: 57 [2022-04-05 05:56:55,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1268, Invalid=2392, Unknown=0, NotChecked=0, Total=3660 [2022-04-05 05:56:55,486 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:56:55,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 21 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:56:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-05 05:56:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-05 05:56:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-04-05 05:56:55,497 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 32 [2022-04-05 05:56:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:56:55,498 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-04-05 05:56:55,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 05:56:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-04-05 05:56:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-05 05:56:55,502 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:56:55,502 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:56:55,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:56:55,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:56:55,728 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:56:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:56:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1302475432, now seen corresponding path program 4 times [2022-04-05 05:56:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:56:55,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588378427] [2022-04-05 05:56:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:56:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:56:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:56:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:56:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:56,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:56:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588378427] [2022-04-05 05:56:56,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588378427] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:56:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430473482] [2022-04-05 05:56:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:56:56,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:56:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:56:56,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:56:56,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:56:56,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:56:56,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:56:56,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-05 05:56:56,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:56:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:56:56,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:56:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-05 05:56:57,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430473482] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 05:56:57,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-05 05:56:57,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [26, 28] total 55 [2022-04-05 05:56:57,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956452695] [2022-04-05 05:56:57,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:56:57,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 05:56:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:56:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 05:56:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2580, Unknown=0, NotChecked=0, Total=2970 [2022-04-05 05:56:57,901 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-04-05 05:56:57,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:56:57,955 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2022-04-05 05:56:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 05:56:57,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 56 [2022-04-05 05:56:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:56:57,958 INFO L225 Difference]: With dead ends: 57 [2022-04-05 05:56:57,958 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 05:56:57,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 23 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=394, Invalid=2686, Unknown=0, NotChecked=0, Total=3080 [2022-04-05 05:56:57,960 INFO L913 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:56:57,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:56:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 05:56:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 05:56:57,962 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) [2022-04-05 05:56:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 05:56:57,962 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2022-04-05 05:56:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:56:57,963 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 05:56:57,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-04-05 05:56:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 05:56:57,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 05:56:57,966 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 05:56:57,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-05 05:56:58,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:56:58,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 05:56:58,268 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(~SIZE~0)| ~SIZE~0) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 05:56:58,268 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 05:56:58,269 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 05:56:58,269 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 05:56:58,269 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= 50000001 ~SIZE~0) [2022-04-05 05:56:58,269 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 05:56:58,269 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 05:56:58,269 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2022-04-05 05:56:58,269 INFO L878 garLoopResultBuilder]: At program point L25-2(lines 23 30) the Hoare annotation is: (or (not (<= 50000001 ~SIZE~0)) (= main_~i~0 (* (div main_~i~0 4) 4))) [2022-04-05 05:56:58,269 INFO L882 garLoopResultBuilder]: For program point L23-2(lines 23 30) no Hoare annotation was computed. [2022-04-05 05:56:58,269 INFO L882 garLoopResultBuilder]: For program point L25(lines 25 28) no Hoare annotation was computed. [2022-04-05 05:56:58,269 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (not (<= 50000001 ~SIZE~0)) (= main_~i~0 (* main_~j~0 4))) [2022-04-05 05:56:58,270 INFO L882 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2022-04-05 05:56:58,270 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 34) no Hoare annotation was computed. [2022-04-05 05:56:58,270 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 34) no Hoare annotation was computed. [2022-04-05 05:56:58,270 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 17) the Hoare annotation is: true [2022-04-05 05:56:58,270 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 15) no Hoare annotation was computed. [2022-04-05 05:56:58,270 INFO L882 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2022-04-05 05:56:58,270 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 17) no Hoare annotation was computed. [2022-04-05 05:56:58,270 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-04-05 05:56:58,270 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 17) no Hoare annotation was computed. [2022-04-05 05:56:58,273 INFO L719 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-04-05 05:56:58,274 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 05:56:58,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:56:58 BasicIcfg [2022-04-05 05:56:58,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 05:56:58,284 INFO L158 Benchmark]: Toolchain (without parser) took 6820.47ms. Allocated memory was 178.3MB in the beginning and 274.7MB in the end (delta: 96.5MB). Free memory was 119.2MB in the beginning and 166.9MB in the end (delta: -47.7MB). Peak memory consumption was 50.2MB. Max. memory is 8.0GB. [2022-04-05 05:56:58,285 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 178.3MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 05:56:58,285 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.26ms. Allocated memory was 178.3MB in the beginning and 274.7MB in the end (delta: 96.5MB). Free memory was 119.0MB in the beginning and 248.2MB in the end (delta: -129.2MB). Peak memory consumption was 16.3MB. Max. memory is 8.0GB. [2022-04-05 05:56:58,285 INFO L158 Benchmark]: Boogie Preprocessor took 28.47ms. Allocated memory is still 274.7MB. Free memory was 248.2MB in the beginning and 246.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 05:56:58,285 INFO L158 Benchmark]: RCFGBuilder took 205.38ms. Allocated memory is still 274.7MB. Free memory was 246.5MB in the beginning and 236.1MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 05:56:58,286 INFO L158 Benchmark]: IcfgTransformer took 19.73ms. Allocated memory is still 274.7MB. Free memory was 236.1MB in the beginning and 235.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 05:56:58,286 INFO L158 Benchmark]: TraceAbstraction took 6362.85ms. Allocated memory is still 274.7MB. Free memory was 234.5MB in the beginning and 166.9MB in the end (delta: 67.6MB). Peak memory consumption was 69.2MB. Max. memory is 8.0GB. [2022-04-05 05:56:58,287 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 178.3MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.26ms. Allocated memory was 178.3MB in the beginning and 274.7MB in the end (delta: 96.5MB). Free memory was 119.0MB in the beginning and 248.2MB in the end (delta: -129.2MB). Peak memory consumption was 16.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.47ms. Allocated memory is still 274.7MB. Free memory was 248.2MB in the beginning and 246.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 205.38ms. Allocated memory is still 274.7MB. Free memory was 246.5MB in the beginning and 236.1MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 19.73ms. Allocated memory is still 274.7MB. Free memory was 236.1MB in the beginning and 235.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 6362.85ms. Allocated memory is still 274.7MB. Free memory was 234.5MB in the beginning and 166.9MB in the end (delta: 67.6MB). Peak memory consumption was 69.2MB. 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: 14]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 6, TraceHistogramMax: 22, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 223 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 222 mSDsluCounter, 127 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 57 mSDsCounter, 335 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 300 IncrementalHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 335 mSolverCounterUnsat, 70 mSDtfsCounter, 300 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 349 GetRequests, 164 SyntacticMatches, 23 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=5, InterpolantAutomatonStates: 66, 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, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 35 NumberOfFragments, 38 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 380 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 268 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 376 ConstructedInterpolants, 0 QuantifiedInterpolants, 1626 SizeOfPredicates, 7 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 484/1803 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: 23]: Loop Invariant Derived loop invariant: !(50000001 <= SIZE) || i == i / 4 * 4 RESULT: Ultimate proved your program to be correct! [2022-04-05 05:56:58,318 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...