/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 00:08:35,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 00:08:35,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 00:08:35,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 00:08:35,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 00:08:35,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 00:08:35,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 00:08:35,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 00:08:35,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 00:08:35,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 00:08:35,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 00:08:35,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 00:08:35,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 00:08:35,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 00:08:35,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 00:08:35,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 00:08:35,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 00:08:35,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 00:08:35,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 00:08:35,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 00:08:35,586 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 00:08:35,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 00:08:35,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 00:08:35,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 00:08:35,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 00:08:35,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 00:08:35,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 00:08:35,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 00:08:35,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 00:08:35,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 00:08:35,616 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 00:08:35,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 00:08:35,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 00:08:35,618 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 00:08:35,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 00:08:35,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 00:08:35,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 00:08:35,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 00:08:35,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 00:08:35,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 00:08:35,620 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 00:08:35,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 00:08:35,620 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 00:08:35,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 00:08:35,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 00:08:35,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 00:08:35,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 00:08:35,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 00:08:35,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:08:35,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 00:08:35,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 00:08:35,622 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 00:08:35,622 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 00:08:35,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 00:08:35,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 00:08:35,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 00:08:35,907 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 00:08:35,908 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 00:08:35,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2022-04-05 00:08:35,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47ea8d195/2ee6c5f8bc1b4d5592695b5d5815aab6/FLAG4d4e3fa10 [2022-04-05 00:08:36,349 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 00:08:36,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2022-04-05 00:08:36,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47ea8d195/2ee6c5f8bc1b4d5592695b5d5815aab6/FLAG4d4e3fa10 [2022-04-05 00:08:36,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47ea8d195/2ee6c5f8bc1b4d5592695b5d5815aab6 [2022-04-05 00:08:36,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 00:08:36,384 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 00:08:36,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 00:08:36,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 00:08:36,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 00:08:36,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e80b536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36, skipping insertion in model container [2022-04-05 00:08:36,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 00:08:36,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 00:08:36,547 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/linear_sea.ch.c[383,396] [2022-04-05 00:08:36,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:08:36,584 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 00:08:36,614 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/linear_sea.ch.c[383,396] [2022-04-05 00:08:36,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:08:36,631 INFO L208 MainTranslator]: Completed translation [2022-04-05 00:08:36,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36 WrapperNode [2022-04-05 00:08:36,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 00:08:36,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 00:08:36,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 00:08:36,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 00:08:36,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 00:08:36,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 00:08:36,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 00:08:36,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 00:08:36,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:08:36,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:08:36,715 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 00:08:36,738 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 00:08:36,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 00:08:36,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 00:08:36,749 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 00:08:36,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 00:08:36,750 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2022-04-05 00:08:36,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 00:08:36,750 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-04-05 00:08:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 00:08:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 00:08:36,750 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 00:08:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 00:08:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-04-05 00:08:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 00:08:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 00:08:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2022-04-05 00:08:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 00:08:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 00:08:36,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-05 00:08:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-04-05 00:08:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 00:08:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 00:08:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 00:08:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 00:08:36,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 00:08:36,811 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 00:08:36,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 00:08:36,970 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 00:08:36,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 00:08:36,979 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 00:08:36,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:08:36 BoogieIcfgContainer [2022-04-05 00:08:36,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 00:08:36,981 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 00:08:36,981 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 00:08:36,982 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 00:08:36,985 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:08:36" (1/1) ... [2022-04-05 00:08:36,987 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 00:08:37,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:08:37 BasicIcfg [2022-04-05 00:08:37,001 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 00:08:37,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 00:08:37,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 00:08:37,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 00:08:37,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 12:08:36" (1/4) ... [2022-04-05 00:08:37,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c8007c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:08:37, skipping insertion in model container [2022-04-05 00:08:37,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:08:36" (2/4) ... [2022-04-05 00:08:37,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c8007c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:08:37, skipping insertion in model container [2022-04-05 00:08:37,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:08:36" (3/4) ... [2022-04-05 00:08:37,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c8007c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:08:37, skipping insertion in model container [2022-04-05 00:08:37,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:08:37" (4/4) ... [2022-04-05 00:08:37,009 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.cJordan [2022-04-05 00:08:37,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 00:08:37,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 00:08:37,049 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 00:08:37,056 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 00:08:37,056 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 00:08:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 00:08:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 00:08:37,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:08:37,077 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:08:37,077 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:08:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:08:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -679551393, now seen corresponding path program 1 times [2022-04-05 00:08:37,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:08:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148377510] [2022-04-05 00:08:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:08:37,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:08:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:37,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:08:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:08:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:37,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 00:08:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:37,289 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 00:08:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:08:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148377510] [2022-04-05 00:08:37,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148377510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:08:37,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:08:37,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 00:08:37,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2390062] [2022-04-05 00:08:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:08:37,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 00:08:37,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:08:37,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 00:08:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:08:37,321 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 00:08:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:08:37,416 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-04-05 00:08:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 00:08:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-05 00:08:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:08:37,423 INFO L225 Difference]: With dead ends: 35 [2022-04-05 00:08:37,423 INFO L226 Difference]: Without dead ends: 26 [2022-04-05 00:08:37,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 00:08:37,427 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:08:37,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 00:08:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-05 00:08:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-05 00:08:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 00:08:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-04-05 00:08:37,461 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-04-05 00:08:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:08:37,461 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-04-05 00:08:37,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 00:08:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-04-05 00:08:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 00:08:37,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:08:37,464 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:08:37,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 00:08:37,465 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:08:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:08:37,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1069263323, now seen corresponding path program 1 times [2022-04-05 00:08:37,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:08:37,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233222405] [2022-04-05 00:08:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:08:37,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:08:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:37,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:08:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:37,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:08:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:37,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 00:08:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:37,679 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 00:08:37,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:08:37,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233222405] [2022-04-05 00:08:37,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233222405] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:08:37,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:08:37,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-05 00:08:37,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705954564] [2022-04-05 00:08:37,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:08:37,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 00:08:37,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:08:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 00:08:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-05 00:08:37,683 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 00:08:37,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:08:37,906 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-04-05 00:08:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 00:08:37,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-04-05 00:08:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:08:37,910 INFO L225 Difference]: With dead ends: 32 [2022-04-05 00:08:37,913 INFO L226 Difference]: Without dead ends: 26 [2022-04-05 00:08:37,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 00:08:37,918 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:08:37,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 00:08:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-05 00:08:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-05 00:08:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 00:08:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-05 00:08:37,923 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2022-04-05 00:08:37,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:08:37,923 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-05 00:08:37,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 00:08:37,923 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-05 00:08:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 00:08:37,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:08:37,924 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:08:37,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 00:08:37,925 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:08:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:08:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash 673547012, now seen corresponding path program 1 times [2022-04-05 00:08:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:08:37,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027950766] [2022-04-05 00:08:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:08:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:08:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:38,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:08:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:08:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:38,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 00:08:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:38,207 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 00:08:38,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:08:38,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027950766] [2022-04-05 00:08:38,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027950766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:08:38,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:08:38,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-05 00:08:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657087243] [2022-04-05 00:08:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:08:38,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 00:08:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:08:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 00:08:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-05 00:08:38,210 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 00:08:40,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-05 00:08:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:08:40,659 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-04-05 00:08:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 00:08:40,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-04-05 00:08:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:08:40,661 INFO L225 Difference]: With dead ends: 31 [2022-04-05 00:08:40,661 INFO L226 Difference]: Without dead ends: 30 [2022-04-05 00:08:40,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-04-05 00:08:40,663 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-05 00:08:40,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 83 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-04-05 00:08:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-05 00:08:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-05 00:08:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 00:08:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-04-05 00:08:40,668 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-04-05 00:08:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:08:40,668 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-04-05 00:08:40,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 00:08:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-05 00:08:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 00:08:40,669 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:08:40,669 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:08:40,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 00:08:40,669 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:08:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:08:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash -977632473, now seen corresponding path program 1 times [2022-04-05 00:08:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:08:40,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021910067] [2022-04-05 00:08:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:08:40,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:08:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:40,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:08:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:08:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:40,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 00:08:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:08:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:08:41,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:08:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021910067] [2022-04-05 00:08:41,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021910067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:08:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640032430] [2022-04-05 00:08:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:08:41,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:08:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:08:41,031 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 00:08:41,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process