/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/nla-digbench/hard-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:57:14,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:57:14,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:57:14,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 15:57:14,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 15:57:14,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 15:57:14,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 15:57:14,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 15:57:14,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 15:57:14,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 15:57:14,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 15:57:14,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 15:57:14,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:57:14,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:57:14,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:57:14,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:57:14,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:57:14,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:57:14,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:57:14,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:57:14,445 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:57:14,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:57:14,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:57:14,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:57:14,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:57:14,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:57:14,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:57:14,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:57:14,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:57:14,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:57:14,468 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:57:14,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:57:14,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:57:14,469 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:57:14,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:57:14,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:57:14,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:57:14,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:57:14,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:57:14,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:57:14,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:57:14,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:57:14,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:57:14,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:57:14,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:57:14,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:57:14,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:57:14,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:57:14,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:57:14,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:57:14,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:57:14,471 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:57:14,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:57:14,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:57:14,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:57:14,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:57:14,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:57:14,679 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:57:14,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-u.c [2022-03-17 15:57:14,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5421bed41/ad219a058cb84fef9942efa4f5c42a40/FLAGea397589e [2022-03-17 15:57:15,015 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:57:15,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-u.c [2022-03-17 15:57:15,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5421bed41/ad219a058cb84fef9942efa4f5c42a40/FLAGea397589e [2022-03-17 15:57:15,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5421bed41/ad219a058cb84fef9942efa4f5c42a40 [2022-03-17 15:57:15,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:57:15,455 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:57:15,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:57:15,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:57:15,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:57:15,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c24512b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15, skipping insertion in model container [2022-03-17 15:57:15,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:57:15,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:57:15,578 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-u.c[537,550] [2022-03-17 15:57:15,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:57:15,593 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:57:15,601 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-u.c[537,550] [2022-03-17 15:57:15,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:57:15,613 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:57:15,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15 WrapperNode [2022-03-17 15:57:15,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:57:15,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:57:15,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:57:15,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:57:15,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:57:15,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:57:15,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:57:15,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:57:15,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:57:15,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:57:15,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 15:57:15,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 15:57:15,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:57:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:57:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:57:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:57:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:57:15,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:57:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:57:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:57:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:57:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:57:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 15:57:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:57:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:57:15,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:57:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:57:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:57:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:57:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:57:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:57:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:57:15,730 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:57:15,731 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:57:15,820 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:57:15,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:57:15,825 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 15:57:15,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:57:15 BoogieIcfgContainer [2022-03-17 15:57:15,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:57:15,827 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:57:15,827 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:57:15,827 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:57:15,829 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:57:15" (1/1) ... [2022-03-17 15:57:15,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:57:15 BasicIcfg [2022-03-17 15:57:15,845 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:57:15,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:57:15,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:57:15,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:57:15,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:57:15" (1/4) ... [2022-03-17 15:57:15,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0f9148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:57:15, skipping insertion in model container [2022-03-17 15:57:15,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:57:15" (2/4) ... [2022-03-17 15:57:15,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0f9148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:57:15, skipping insertion in model container [2022-03-17 15:57:15,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:57:15" (3/4) ... [2022-03-17 15:57:15,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0f9148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:57:15, skipping insertion in model container [2022-03-17 15:57:15,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:57:15" (4/4) ... [2022-03-17 15:57:15,861 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.cJordan [2022-03-17 15:57:15,864 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:57:15,864 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:57:15,908 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:57:15,913 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 [2022-03-17 15:57:15,913 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:57:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 15:57:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 15:57:15,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:15,949 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:15,949 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2022-03-17 15:57:15,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:15,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835869673] [2022-03-17 15:57:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:57:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:57:16,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:16,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835869673] [2022-03-17 15:57:16,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835869673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:57:16,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:57:16,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:57:16,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282329347] [2022-03-17 15:57:16,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:57:16,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:57:16,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:57:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:57:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:57:16,112 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 15:57:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:16,169 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-03-17 15:57:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:57:16,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 15:57:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:16,177 INFO L225 Difference]: With dead ends: 35 [2022-03-17 15:57:16,177 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 15:57:16,178 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:57:16,181 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:16,184 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:57:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 15:57:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 15:57:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 15:57:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-17 15:57:16,207 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-17 15:57:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:16,208 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-17 15:57:16,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 15:57:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-17 15:57:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 15:57:16,208 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:16,209 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:16,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:57:16,209 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:16,210 INFO L85 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2022-03-17 15:57:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:16,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583489069] [2022-03-17 15:57:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:16,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:57:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:57:16,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:16,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583489069] [2022-03-17 15:57:16,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583489069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:57:16,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:57:16,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 15:57:16,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280606196] [2022-03-17 15:57:16,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:57:16,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:57:16,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:57:16,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:57:16,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 15:57:16,294 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 15:57:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:16,464 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-17 15:57:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:57:16,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 15:57:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:16,467 INFO L225 Difference]: With dead ends: 41 [2022-03-17 15:57:16,467 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 15:57:16,471 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 15:57:16,472 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:16,473 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:57:16,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 15:57:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-17 15:57:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 15:57:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-17 15:57:16,493 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-17 15:57:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:16,493 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-17 15:57:16,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 15:57:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-17 15:57:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 15:57:16,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:16,494 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:16,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:57:16,495 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2022-03-17 15:57:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:16,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172259134] [2022-03-17 15:57:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:57:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-17 15:57:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:57:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:16,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172259134] [2022-03-17 15:57:16,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172259134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:57:16,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:57:16,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 15:57:16,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388834719] [2022-03-17 15:57:16,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:57:16,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:57:16,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:57:16,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:57:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 15:57:16,621 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 15:57:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:16,750 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-17 15:57:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:57:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-17 15:57:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:16,753 INFO L225 Difference]: With dead ends: 45 [2022-03-17 15:57:16,753 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 15:57:16,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 15:57:16,759 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:16,761 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:57:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 15:57:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-17 15:57:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 15:57:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-17 15:57:16,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-17 15:57:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:16,771 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-17 15:57:16,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 15:57:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-17 15:57:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 15:57:16,771 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:16,771 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:16,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 15:57:16,772 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2022-03-17 15:57:16,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:16,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595472973] [2022-03-17 15:57:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:16,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:57:16,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856005929] [2022-03-17 15:57:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:16,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:16,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:57:16,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:57:16,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:57:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 15:57:16,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:57:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:57:17,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 15:57:17,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:17,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595472973] [2022-03-17 15:57:17,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:57:17,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856005929] [2022-03-17 15:57:17,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856005929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:57:17,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:57:17,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 15:57:17,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550965997] [2022-03-17 15:57:17,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:57:17,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 15:57:17,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:57:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 15:57:17,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:57:17,045 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 15:57:19,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:57:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:19,316 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2022-03-17 15:57:19,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 15:57:19,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-17 15:57:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:19,319 INFO L225 Difference]: With dead ends: 59 [2022-03-17 15:57:19,319 INFO L226 Difference]: Without dead ends: 58 [2022-03-17 15:57:19,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-17 15:57:19,319 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:19,320 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 206 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 15:57:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-17 15:57:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-03-17 15:57:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 15:57:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-03-17 15:57:19,324 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 27 [2022-03-17 15:57:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:19,325 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-03-17 15:57:19,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 15:57:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-03-17 15:57:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 15:57:19,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:19,326 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:19,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 15:57:19,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:19,544 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:19,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2022-03-17 15:57:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:19,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614581764] [2022-03-17 15:57:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:19,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:57:19,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49471563] [2022-03-17 15:57:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:19,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:19,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:57:19,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:57:19,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:57:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:19,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 15:57:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:57:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:57:19,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 15:57:19,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:19,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614581764] [2022-03-17 15:57:19,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:57:19,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49471563] [2022-03-17 15:57:19,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49471563] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:57:19,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:57:19,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 15:57:19,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524790010] [2022-03-17 15:57:19,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:57:19,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:57:19,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:57:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:57:19,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 15:57:19,794 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 15:57:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:19,934 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2022-03-17 15:57:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:57:19,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-17 15:57:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:19,936 INFO L225 Difference]: With dead ends: 71 [2022-03-17 15:57:19,936 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 15:57:19,936 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:57:19,937 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:19,937 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:57:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 15:57:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-17 15:57:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 15:57:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-03-17 15:57:19,943 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 34 [2022-03-17 15:57:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:19,943 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-03-17 15:57:19,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 15:57:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-03-17 15:57:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 15:57:19,944 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:19,944 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:19,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:57:20,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:20,162 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2022-03-17 15:57:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:20,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734017645] [2022-03-17 15:57:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:20,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:57:20,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259876710] [2022-03-17 15:57:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:20,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:20,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:57:20,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:57:20,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:57:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 15:57:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:57:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 15:57:20,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:57:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 15:57:20,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:20,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734017645] [2022-03-17 15:57:20,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:57:20,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259876710] [2022-03-17 15:57:20,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259876710] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:57:20,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 15:57:20,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-17 15:57:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522327263] [2022-03-17 15:57:20,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:57:20,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:57:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:57:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:57:20,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:57:20,905 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 15:57:22,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 15:57:24,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 15:57:25,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 15:57:27,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 15:57:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:28,342 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-03-17 15:57:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 15:57:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-17 15:57:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:28,345 INFO L225 Difference]: With dead ends: 79 [2022-03-17 15:57:28,345 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 15:57:28,345 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:57:28,346 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:28,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 122 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-03-17 15:57:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 15:57:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-03-17 15:57:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 15:57:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-03-17 15:57:28,356 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 44 [2022-03-17 15:57:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:28,356 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-03-17 15:57:28,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 15:57:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-03-17 15:57:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 15:57:28,357 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:28,357 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1] [2022-03-17 15:57:28,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 15:57:28,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:28,558 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash 582060793, now seen corresponding path program 1 times [2022-03-17 15:57:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:28,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291883244] [2022-03-17 15:57:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:28,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:28,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:57:28,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109281489] [2022-03-17 15:57:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:28,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:28,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:57:28,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:57:28,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process