/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/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:43:18,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:43:18,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:43:18,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:43:18,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:43:18,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:43:18,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:43:18,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:43:18,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:43:18,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:43:18,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:43:18,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:43:18,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:43:18,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:43:18,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:43:18,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:43:18,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:43:18,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:43:18,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:43:18,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:43:18,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:43:18,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:43:18,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:43:18,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:43:18,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 20:43:18,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:43:18,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:43:18,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:43:18,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:43:18,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:43:18,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:43:18,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:43:18,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:43:18,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:43:18,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:43:18,738 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:43:18,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:43:18,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:43:18,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:43:18,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:43:18,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:43:18,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:43:18,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:43:18,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:43:18,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:43:18,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:43:18,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:43:18,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:43:18,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:43:18,741 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:43:18,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:43:18,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:43:18,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:43:18,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:43:18,940 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:43:18,941 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:43:18,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2022-02-23 20:43:19,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e97bf815/b2a3aa19e38748f8b84ffa5e9cf60130/FLAGb4dfcf311 [2022-02-23 20:43:19,291 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:43:19,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2022-02-23 20:43:19,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e97bf815/b2a3aa19e38748f8b84ffa5e9cf60130/FLAGb4dfcf311 [2022-02-23 20:43:19,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e97bf815/b2a3aa19e38748f8b84ffa5e9cf60130 [2022-02-23 20:43:19,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:43:19,306 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:43:19,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:43:19,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:43:19,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:43:19,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c3a4fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19, skipping insertion in model container [2022-02-23 20:43:19,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:43:19,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:43:19,414 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i[849,862] [2022-02-23 20:43:19,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:43:19,432 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:43:19,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i[849,862] [2022-02-23 20:43:19,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:43:19,449 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:43:19,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19 WrapperNode [2022-02-23 20:43:19,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:43:19,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:43:19,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:43:19,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:43:19,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:43:19,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:43:19,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:43:19,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:43:19,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:43:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:43:19,501 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) [2022-02-23 20:43:19,508 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 [2022-02-23 20:43:19,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:43:19,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:43:19,535 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:43:19,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 20:43:19,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:43:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:43:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:43:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:43:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:43:19,605 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:43:19,606 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:43:19,758 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:43:19,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:43:19,762 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 20:43:19,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:43:19 BoogieIcfgContainer [2022-02-23 20:43:19,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:43:19,764 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:43:19,764 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:43:19,765 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:43:19,767 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:43:19" (1/1) ... [2022-02-23 20:43:19,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:43:19 BasicIcfg [2022-02-23 20:43:19,789 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:43:19,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:43:19,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:43:19,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:43:19,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:43:19" (1/4) ... [2022-02-23 20:43:19,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a5d5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:43:19, skipping insertion in model container [2022-02-23 20:43:19,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:43:19" (2/4) ... [2022-02-23 20:43:19,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a5d5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:43:19, skipping insertion in model container [2022-02-23 20:43:19,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:43:19" (3/4) ... [2022-02-23 20:43:19,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a5d5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:43:19, skipping insertion in model container [2022-02-23 20:43:19,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:43:19" (4/4) ... [2022-02-23 20:43:19,798 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2.iqvasr [2022-02-23 20:43:19,802 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:43:19,802 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:43:19,842 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:43:19,847 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 20:43:19,848 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:43:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-02-23 20:43:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 20:43:19,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:43:19,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:43:19,870 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:43:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:43:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash -742242332, now seen corresponding path program 1 times [2022-02-23 20:43:19,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:43:19,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555454178] [2022-02-23 20:43:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:43:19,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:43:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:43:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:43:20,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:43:20,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555454178] [2022-02-23 20:43:20,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555454178] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:43:20,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:43:20,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 20:43:20,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899161735] [2022-02-23 20:43:20,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:43:20,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 20:43:20,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:43:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 20:43:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:43:20,061 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-02-23 20:43:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:43:20,092 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-02-23 20:43:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 20:43:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2022-02-23 20:43:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:43:20,097 INFO L225 Difference]: With dead ends: 40 [2022-02-23 20:43:20,097 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 20:43:20,099 INFO L932 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 [2022-02-23 20:43:20,103 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 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 [2022-02-23 20:43:20,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:43:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 20:43:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-23 20:43:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-02-23 20:43:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-02-23 20:43:20,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-02-23 20:43:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:43:20,132 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-02-23 20:43:20,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-02-23 20:43:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-02-23 20:43:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 20:43:20,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:43:20,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:43:20,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:43:20,134 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:43:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:43:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1029197154, now seen corresponding path program 1 times [2022-02-23 20:43:20,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:43:20,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102531829] [2022-02-23 20:43:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:43:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:43:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:43:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:43:20,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:43:20,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102531829] [2022-02-23 20:43:20,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102531829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:43:20,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:43:20,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 20:43:20,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768113629] [2022-02-23 20:43:20,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:43:20,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 20:43:20,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:43:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 20:43:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 20:43:20,192 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-02-23 20:43:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:43:20,230 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-02-23 20:43:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 20:43:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-02-23 20:43:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:43:20,231 INFO L225 Difference]: With dead ends: 30 [2022-02-23 20:43:20,231 INFO L226 Difference]: Without dead ends: 21 [2022-02-23 20:43:20,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 20:43:20,232 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:43:20,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:43:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-23 20:43:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-02-23 20:43:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-02-23 20:43:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-02-23 20:43:20,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-02-23 20:43:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:43:20,236 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-02-23 20:43:20,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-02-23 20:43:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-02-23 20:43:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 20:43:20,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:43:20,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:43:20,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:43:20,243 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:43:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:43:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 559300038, now seen corresponding path program 1 times [2022-02-23 20:43:20,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:43:20,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860074104] [2022-02-23 20:43:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:43:20,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:43:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:43:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 20:43:20,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:43:20,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860074104] [2022-02-23 20:43:20,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860074104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:43:20,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939142786] [2022-02-23 20:43:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:43:20,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:43:20,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:43:20,304 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) [2022-02-23 20:43:20,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 20:43:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 20:43:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:43:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 20:43:20,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:43:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 20:43:20,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939142786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:43:20,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:43:20,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-23 20:43:20,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536748411] [2022-02-23 20:43:20,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:43:20,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 20:43:20,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:43:20,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 20:43:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 20:43:20,491 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:43:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:43:20,587 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-02-23 20:43:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:43:20,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-23 20:43:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:43:20,589 INFO L225 Difference]: With dead ends: 41 [2022-02-23 20:43:20,589 INFO L226 Difference]: Without dead ends: 31 [2022-02-23 20:43:20,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-02-23 20:43:20,593 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:43:20,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:43:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-23 20:43:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-23 20:43:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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) [2022-02-23 20:43:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-02-23 20:43:20,605 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 18 [2022-02-23 20:43:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:43:20,606 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-02-23 20:43:20,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:43:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-02-23 20:43:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 20:43:20,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:43:20,609 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:43:20,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 20:43:20,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:43:20,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:43:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:43:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1216277774, now seen corresponding path program 2 times [2022-02-23 20:43:20,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:43:20,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768616151] [2022-02-23 20:43:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:43:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:43:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:43:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 20:43:20,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:43:20,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768616151] [2022-02-23 20:43:20,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768616151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:43:20,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496500287] [2022-02-23 20:43:20,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:43:20,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:43:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:43:20,952 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) [2022-02-23 20:43:20,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 20:43:21,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:43:21,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:43:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 20:43:21,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:43:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 20:43:21,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:43:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 20:43:21,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496500287] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:43:21,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:43:21,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-23 20:43:21,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148243116] [2022-02-23 20:43:21,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:43:21,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 20:43:21,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:43:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 20:43:21,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-02-23 20:43:21,181 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:43:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:43:21,341 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2022-02-23 20:43:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 20:43:21,341 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-23 20:43:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:43:21,343 INFO L225 Difference]: With dead ends: 71 [2022-02-23 20:43:21,344 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 20:43:21,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-02-23 20:43:21,348 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:43:21,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 26 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:43:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 20:43:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-23 20:43:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 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) [2022-02-23 20:43:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-02-23 20:43:21,366 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 30 [2022-02-23 20:43:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:43:21,366 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-02-23 20:43:21,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:43:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-02-23 20:43:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 20:43:21,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:43:21,371 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:43:21,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 20:43:21,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 20:43:21,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:43:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:43:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1982943050, now seen corresponding path program 3 times [2022-02-23 20:43:21,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:43:21,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825380347] [2022-02-23 20:43:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:43:21,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:43:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:21,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:43:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-23 20:43:21,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:43:21,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825380347] [2022-02-23 20:43:21,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825380347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:43:21,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935334692] [2022-02-23 20:43:21,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 20:43:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:43:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:43:21,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:43:21,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 20:43:23,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 20:43:23,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:43:23,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 20:43:23,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:43:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-23 20:43:23,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:43:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-23 20:43:23,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935334692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:43:23,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:43:23,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-02-23 20:43:23,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308584936] [2022-02-23 20:43:23,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:43:23,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 20:43:23,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:43:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 20:43:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-02-23 20:43:23,505 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:43:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:43:23,888 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2022-02-23 20:43:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 20:43:23,888 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-23 20:43:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:43:23,889 INFO L225 Difference]: With dead ends: 131 [2022-02-23 20:43:23,889 INFO L226 Difference]: Without dead ends: 103 [2022-02-23 20:43:23,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-02-23 20:43:23,890 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 147 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:43:23,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 26 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:43:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-23 20:43:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-02-23 20:43:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 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) [2022-02-23 20:43:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-02-23 20:43:23,898 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 54 [2022-02-23 20:43:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:43:23,898 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-02-23 20:43:23,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:43:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-02-23 20:43:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-23 20:43:23,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:43:23,900 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:43:23,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 20:43:24,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:43:24,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:43:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:43:24,116 INFO L85 PathProgramCache]: Analyzing trace with hash 951586810, now seen corresponding path program 4 times [2022-02-23 20:43:24,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:43:24,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892121043] [2022-02-23 20:43:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:43:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:43:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:43:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-02-23 20:43:24,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:43:24,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892121043] [2022-02-23 20:43:24,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892121043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:43:24,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685272311] [2022-02-23 20:43:24,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 20:43:24,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:43:24,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:43:24,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:43:24,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 20:43:24,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 20:43:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:43:24,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 20:43:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:43:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-02-23 20:43:24,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:43:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-02-23 20:43:25,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685272311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:43:25,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:43:25,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-02-23 20:43:25,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060229954] [2022-02-23 20:43:25,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:43:25,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 20:43:25,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:43:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 20:43:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 20:43:25,408 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:43:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:43:26,412 INFO L93 Difference]: Finished difference Result 251 states and 300 transitions. [2022-02-23 20:43:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-23 20:43:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-23 20:43:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:43:26,414 INFO L225 Difference]: With dead ends: 251 [2022-02-23 20:43:26,414 INFO L226 Difference]: Without dead ends: 199 [2022-02-23 20:43:26,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-02-23 20:43:26,417 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 315 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:43:26,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 41 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 20:43:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-23 20:43:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-02-23 20:43:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 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) [2022-02-23 20:43:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-02-23 20:43:26,427 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 102 [2022-02-23 20:43:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:43:26,427 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-02-23 20:43:26,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:43:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-02-23 20:43:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-02-23 20:43:26,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:43:26,444 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:43:26,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 20:43:26,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:43:26,659 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:43:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:43:26,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1740721830, now seen corresponding path program 5 times [2022-02-23 20:43:26,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:43:26,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235862779] [2022-02-23 20:43:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:43:26,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:43:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:27,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:43:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:43:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-02-23 20:43:27,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:43:27,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235862779] [2022-02-23 20:43:27,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235862779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:43:27,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017095142] [2022-02-23 20:43:27,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 20:43:27,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:43:27,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:43:27,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:43:27,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process