/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/count_up_down-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 04:49:10,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 04:49:10,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 04:49:10,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 04:49:10,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 04:49:10,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 04:49:10,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 04:49:10,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 04:49:10,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 04:49:10,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 04:49:10,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 04:49:10,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 04:49:10,438 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 04:49:10,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 04:49:10,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 04:49:10,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 04:49:10,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 04:49:10,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 04:49:10,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 04:49:10,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 04:49:10,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 04:49:10,454 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 04:49:10,481 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 04:49:10,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 04:49:10,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 04:49:10,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 04:49:10,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 04:49:10,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 04:49:10,487 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 04:49:10,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 04:49:10,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 04:49:10,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 04:49:10,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 04:49:10,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 04:49:10,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 04:49:10,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 04:49:10,489 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 04:49:10,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 04:49:10,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 04:49:10,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 04:49:10,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 04:49:10,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:49:10,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 04:49:10,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 04:49:10,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 04:49:10,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 04:49:10,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 04:49:10,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 04:49:10,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 04:49:10,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 04:49:10,492 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 04:49:10,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 04:49:10,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 04:49:10,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 04:49:10,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 04:49:10,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 04:49:10,708 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 04:49:10,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-1.c [2022-04-05 04:49:10,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209788340/e76e7134eebd4972af7ea321f26fd8f6/FLAG6cb859ac6 [2022-04-05 04:49:11,169 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 04:49:11,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down-1.c [2022-04-05 04:49:11,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209788340/e76e7134eebd4972af7ea321f26fd8f6/FLAG6cb859ac6 [2022-04-05 04:49:11,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209788340/e76e7134eebd4972af7ea321f26fd8f6 [2022-04-05 04:49:11,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 04:49:11,195 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 04:49:11,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 04:49:11,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 04:49:11,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 04:49:11,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1728649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11, skipping insertion in model container [2022-04-05 04:49:11,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 04:49:11,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 04:49:11,349 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/count_up_down-1.c[327,340] [2022-04-05 04:49:11,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:49:11,366 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 04:49:11,375 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/count_up_down-1.c[327,340] [2022-04-05 04:49:11,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:49:11,389 INFO L208 MainTranslator]: Completed translation [2022-04-05 04:49:11,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11 WrapperNode [2022-04-05 04:49:11,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 04:49:11,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 04:49:11,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 04:49:11,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 04:49:11,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 04:49:11,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 04:49:11,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 04:49:11,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 04:49:11,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:49:11,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:11,454 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 04:49:11,456 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 04:49:11,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 04:49:11,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 04:49:11,487 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 04:49:11,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 04:49:11,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 04:49:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 04:49:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 04:49:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 04:49:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 04:49:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 04:49:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 04:49:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 04:49:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 04:49:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 04:49:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 04:49:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 04:49:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 04:49:11,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 04:49:11,537 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 04:49:11,538 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 04:49:11,614 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 04:49:11,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 04:49:11,618 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 04:49:11,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:11 BoogieIcfgContainer [2022-04-05 04:49:11,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 04:49:11,620 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 04:49:11,620 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 04:49:11,621 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 04:49:11,624 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:11" (1/1) ... [2022-04-05 04:49:11,625 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 04:49:11,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:49:11 BasicIcfg [2022-04-05 04:49:11,635 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 04:49:11,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 04:49:11,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 04:49:11,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 04:49:11,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 04:49:11" (1/4) ... [2022-04-05 04:49:11,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39938947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:49:11, skipping insertion in model container [2022-04-05 04:49:11,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:11" (2/4) ... [2022-04-05 04:49:11,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39938947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:49:11, skipping insertion in model container [2022-04-05 04:49:11,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:11" (3/4) ... [2022-04-05 04:49:11,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39938947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:49:11, skipping insertion in model container [2022-04-05 04:49:11,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:49:11" (4/4) ... [2022-04-05 04:49:11,643 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-1.cqvasr [2022-04-05 04:49:11,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 04:49:11,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 04:49:11,693 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 04:49:11,698 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 04:49:11,699 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 04:49:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 04:49:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 04:49:11,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:11,733 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:11,733 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1690616289, now seen corresponding path program 1 times [2022-04-05 04:49:11,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738937927] [2022-04-05 04:49:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:11,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:11,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:11,954 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 04:49:11,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:11,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738937927] [2022-04-05 04:49:11,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738937927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:11,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:11,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 04:49:11,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813653771] [2022-04-05 04:49:11,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:11,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 04:49:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:12,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 04:49:12,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 04:49:12,008 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:12,078 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-04-05 04:49:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 04:49:12,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-05 04:49:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:12,091 INFO L225 Difference]: With dead ends: 29 [2022-04-05 04:49:12,091 INFO L226 Difference]: Without dead ends: 12 [2022-04-05 04:49:12,099 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 04:49:12,104 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:12,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:49:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-04-05 04:49:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-04-05 04:49:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 04:49:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-04-05 04:49:12,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2022-04-05 04:49:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:12,141 INFO L478 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-04-05 04:49:12,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-04-05 04:49:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 04:49:12,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:12,143 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:12,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 04:49:12,143 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1689692768, now seen corresponding path program 1 times [2022-04-05 04:49:12,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:12,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246633753] [2022-04-05 04:49:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:12,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:12,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:12,359 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 04:49:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:12,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246633753] [2022-04-05 04:49:12,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246633753] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:12,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:12,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 04:49:12,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083613011] [2022-04-05 04:49:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:12,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 04:49:12,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:12,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 04:49:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 04:49:12,364 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:12,465 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-04-05 04:49:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 04:49:12,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-05 04:49:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:12,466 INFO L225 Difference]: With dead ends: 18 [2022-04-05 04:49:12,466 INFO L226 Difference]: Without dead ends: 13 [2022-04-05 04:49:12,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-04-05 04:49:12,470 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:12,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 31 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:49:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-05 04:49:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-05 04:49:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-05 04:49:12,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-04-05 04:49:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:12,480 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-05 04:49:12,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-05 04:49:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 04:49:12,480 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:12,481 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:12,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 04:49:12,481 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash -814146699, now seen corresponding path program 1 times [2022-04-05 04:49:12,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:12,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086594395] [2022-04-05 04:49:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:12,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:12,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:12,694 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 04:49:12,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:12,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086594395] [2022-04-05 04:49:12,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086594395] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350669685] [2022-04-05 04:49:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:12,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:12,703 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 04:49:12,710 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 04:49:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:12,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 04:49:12,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:12,991 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 04:49:12,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:13,161 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 04:49:13,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350669685] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:13,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:13,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-05 04:49:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553831231] [2022-04-05 04:49:13,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:13,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 04:49:13,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:13,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 04:49:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-04-05 04:49:13,169 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 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) [2022-04-05 04:49:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:13,464 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-04-05 04:49:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 04:49:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 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 12 [2022-04-05 04:49:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:13,465 INFO L225 Difference]: With dead ends: 22 [2022-04-05 04:49:13,466 INFO L226 Difference]: Without dead ends: 16 [2022-04-05 04:49:13,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-04-05 04:49:13,467 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:13,467 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:49:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-05 04:49:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-05 04:49:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 04:49:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-04-05 04:49:13,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2022-04-05 04:49:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:13,473 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-04-05 04:49:13,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 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) [2022-04-05 04:49:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-04-05 04:49:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 04:49:13,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:13,474 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:13,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 04:49:13,687 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 04:49:13,688 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash 200712928, now seen corresponding path program 2 times [2022-04-05 04:49:13,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:13,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024946521] [2022-04-05 04:49:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:13,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:14,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:14,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:14,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024946521] [2022-04-05 04:49:14,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024946521] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316527414] [2022-04-05 04:49:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:49:14,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:14,440 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 04:49:14,441 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 04:49:14,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:49:14,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:49:14,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 04:49:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:53:55,955 WARN L232 SmtUtils]: Spent 4.31m on a formula simplification. DAG size of input: 20331 DAG size of output: 12419 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)