/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-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 10:35:05,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 10:35:05,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 10:35:06,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 10:35:06,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 10:35:06,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 10:35:06,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 10:35:06,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 10:35:06,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 10:35:06,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 10:35:06,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 10:35:06,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 10:35:06,066 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 10:35:06,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 10:35:06,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 10:35:06,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 10:35:06,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 10:35:06,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 10:35:06,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 10:35:06,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 10:35:06,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 10:35:06,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 10:35:06,113 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 10:35:06,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 10:35:06,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 10:35:06,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 10:35:06,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 10:35:06,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 10:35:06,116 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 10:35:06,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 10:35:06,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 10:35:06,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 10:35:06,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 10:35:06,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 10:35:06,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 10:35:06,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 10:35:06,117 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 10:35:06,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 10:35:06,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 10:35:06,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 10:35:06,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 10:35:06,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:35:06,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 10:35:06,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 10:35:06,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 10:35:06,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 10:35:06,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 10:35:06,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 10:35:06,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 10:35:06,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 10:35:06,120 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 10:35:06,120 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 10:35:06,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 10:35:06,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 10:35:06,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 10:35:06,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 10:35:06,402 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 10:35:06,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2022-04-06 10:35:06,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ed9945c/32c17170d0da45f1a9e930e829c4df77/FLAG7177095f2 [2022-04-06 10:35:06,847 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 10:35:06,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2022-04-06 10:35:06,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ed9945c/32c17170d0da45f1a9e930e829c4df77/FLAG7177095f2 [2022-04-06 10:35:07,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ed9945c/32c17170d0da45f1a9e930e829c4df77 [2022-04-06 10:35:07,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 10:35:07,275 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 10:35:07,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 10:35:07,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 10:35:07,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 10:35:07,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0563df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07, skipping insertion in model container [2022-04-06 10:35:07,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 10:35:07,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 10:35:07,440 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-invariants/linear-inequality-inv-a.c[557,570] [2022-04-06 10:35:07,445 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-invariants/linear-inequality-inv-a.c[613,626] [2022-04-06 10:35:07,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:35:07,456 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 10:35:07,472 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-invariants/linear-inequality-inv-a.c[557,570] [2022-04-06 10:35:07,473 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-invariants/linear-inequality-inv-a.c[613,626] [2022-04-06 10:35:07,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:35:07,487 INFO L208 MainTranslator]: Completed translation [2022-04-06 10:35:07,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07 WrapperNode [2022-04-06 10:35:07,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 10:35:07,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 10:35:07,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 10:35:07,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 10:35:07,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 10:35:07,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 10:35:07,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 10:35:07,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 10:35:07,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:35:07,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:07,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 10:35:07,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 10:35:07,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 10:35:07,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 10:35:07,582 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 10:35:07,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 10:35:07,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 10:35:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 10:35:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 10:35:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2022-04-06 10:35:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 10:35:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 10:35:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 10:35:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 10:35:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 10:35:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 10:35:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 10:35:07,638 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 10:35:07,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 10:35:07,729 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 10:35:07,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 10:35:07,734 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 10:35:07,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:35:07 BoogieIcfgContainer [2022-04-06 10:35:07,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 10:35:07,736 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 10:35:07,737 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 10:35:07,737 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 10:35:07,740 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:35:07" (1/1) ... [2022-04-06 10:35:07,742 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 10:35:07,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:35:07 BasicIcfg [2022-04-06 10:35:07,754 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 10:35:07,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 10:35:07,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 10:35:07,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 10:35:07,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:35:07" (1/4) ... [2022-04-06 10:35:07,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9343e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:35:07, skipping insertion in model container [2022-04-06 10:35:07,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:35:07" (2/4) ... [2022-04-06 10:35:07,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9343e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:35:07, skipping insertion in model container [2022-04-06 10:35:07,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:35:07" (3/4) ... [2022-04-06 10:35:07,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9343e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:35:07, skipping insertion in model container [2022-04-06 10:35:07,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:35:07" (4/4) ... [2022-04-06 10:35:07,761 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.cqvasr [2022-04-06 10:35:07,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 10:35:07,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-04-06 10:35:07,804 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 10:35:07,810 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 10:35:07,810 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-04-06 10:35:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 10:35:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-04-06 10:35:07,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:07,827 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:07,828 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:07,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:07,833 INFO L85 PathProgramCache]: Analyzing trace with hash 733275225, now seen corresponding path program 1 times [2022-04-06 10:35:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:07,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494025771] [2022-04-06 10:35:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:07,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:08,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:08,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494025771] [2022-04-06 10:35:08,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494025771] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:35:08,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:35:08,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 10:35:08,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905657227] [2022-04-06 10:35:08,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:35:08,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 10:35:08,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 10:35:08,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 10:35:08,112 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:08,165 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-04-06 10:35:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 10:35:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-04-06 10:35:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:08,176 INFO L225 Difference]: With dead ends: 28 [2022-04-06 10:35:08,176 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 10:35:08,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 10:35:08,185 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:08,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:35:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 10:35:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 10:35:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 10:35:08,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2022-04-06 10:35:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:08,226 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 10:35:08,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 10:35:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-04-06 10:35:08,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:08,228 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:08,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 10:35:08,228 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:08,231 INFO L85 PathProgramCache]: Analyzing trace with hash 733276186, now seen corresponding path program 1 times [2022-04-06 10:35:08,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:08,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262607067] [2022-04-06 10:35:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:08,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:08,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:08,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262607067] [2022-04-06 10:35:08,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262607067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:35:08,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:35:08,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 10:35:08,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490721171] [2022-04-06 10:35:08,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:35:08,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 10:35:08,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 10:35:08,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 10:35:08,401 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:08,446 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-04-06 10:35:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 10:35:08,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-04-06 10:35:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:08,448 INFO L225 Difference]: With dead ends: 21 [2022-04-06 10:35:08,448 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 10:35:08,449 INFO L912 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 [2022-04-06 10:35:08,450 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:08,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:35:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 10:35:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 10:35:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 10:35:08,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2022-04-06 10:35:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:08,466 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 10:35:08,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 10:35:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 10:35:08,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:08,468 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:08,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 10:35:08,468 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1256753148, now seen corresponding path program 1 times [2022-04-06 10:35:08,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:08,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375515418] [2022-04-06 10:35:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:08,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:08,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:08,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375515418] [2022-04-06 10:35:08,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375515418] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:08,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137499392] [2022-04-06 10:35:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:08,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:08,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 10:35:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:08,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 10:35:08,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:08,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:08,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137499392] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:08,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:08,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 10:35:08,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495737038] [2022-04-06 10:35:08,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:08,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 10:35:08,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:08,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 10:35:08,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-06 10:35:08,896 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:09,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:09,065 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-04-06 10:35:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 10:35:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 10:35:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:09,071 INFO L225 Difference]: With dead ends: 32 [2022-04-06 10:35:09,071 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 10:35:09,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-04-06 10:35:09,073 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:09,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:35:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 10:35:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2022-04-06 10:35:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 10:35:09,078 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2022-04-06 10:35:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:09,078 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 10:35:09,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 10:35:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 10:35:09,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:09,079 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:09,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 10:35:09,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:09,316 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:09,316 INFO L85 PathProgramCache]: Analyzing trace with hash 854829856, now seen corresponding path program 1 times [2022-04-06 10:35:09,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:09,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504539243] [2022-04-06 10:35:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:09,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:09,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:09,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504539243] [2022-04-06 10:35:09,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504539243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:09,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758320039] [2022-04-06 10:35:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:09,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:09,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:09,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:09,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 10:35:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 10:35:09,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:09,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:09,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758320039] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:09,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:09,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-04-06 10:35:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760773927] [2022-04-06 10:35:09,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:09,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 10:35:09,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 10:35:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:35:09,766 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:09,954 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-04-06 10:35:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 10:35:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 10:35:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:09,955 INFO L225 Difference]: With dead ends: 30 [2022-04-06 10:35:09,955 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 10:35:09,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 10:35:09,956 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:09,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 33 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:35:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 10:35:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-06 10:35:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-04-06 10:35:09,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-04-06 10:35:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:09,961 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-04-06 10:35:09,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-04-06 10:35:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 10:35:09,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:09,962 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:09,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 10:35:10,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 10:35:10,163 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:10,163 INFO L85 PathProgramCache]: Analyzing trace with hash 730779802, now seen corresponding path program 2 times [2022-04-06 10:35:10,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:10,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480175520] [2022-04-06 10:35:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:10,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:10,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:10,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480175520] [2022-04-06 10:35:10,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480175520] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:10,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585663796] [2022-04-06 10:35:10,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:35:10,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:10,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:10,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 10:35:10,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:35:10,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 10:35:10,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:10,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:10,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585663796] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:10,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:10,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 10:35:10,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062213452] [2022-04-06 10:35:10,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:10,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 10:35:10,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:10,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 10:35:10,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 10:35:10,774 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:11,170 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-04-06 10:35:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 10:35:11,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 10:35:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:11,171 INFO L225 Difference]: With dead ends: 44 [2022-04-06 10:35:11,171 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 10:35:11,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2022-04-06 10:35:11,172 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:11,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 38 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:35:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 10:35:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2022-04-06 10:35:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-04-06 10:35:11,179 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2022-04-06 10:35:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:11,179 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-04-06 10:35:11,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-06 10:35:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 10:35:11,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:11,180 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:11,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 10:35:11,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:11,407 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash -500501856, now seen corresponding path program 2 times [2022-04-06 10:35:11,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:11,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387085474] [2022-04-06 10:35:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:11,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:11,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387085474] [2022-04-06 10:35:11,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387085474] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446503322] [2022-04-06 10:35:11,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:35:11,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:11,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:11,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:11,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 10:35:11,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:35:11,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 10:35:11,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:12,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446503322] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:12,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:12,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-04-06 10:35:12,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792274165] [2022-04-06 10:35:12,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:12,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 10:35:12,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 10:35:12,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-04-06 10:35:12,145 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:12,627 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-04-06 10:35:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 10:35:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 10:35:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:12,640 INFO L225 Difference]: With dead ends: 46 [2022-04-06 10:35:12,640 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 10:35:12,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-04-06 10:35:12,642 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:12,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 38 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:35:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 10:35:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-04-06 10:35:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-04-06 10:35:12,655 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-04-06 10:35:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:12,655 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-04-06 10:35:12,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-04-06 10:35:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 10:35:12,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:12,656 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:12,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 10:35:12,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:12,877 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:12,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1793837734, now seen corresponding path program 3 times [2022-04-06 10:35:12,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:12,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338230636] [2022-04-06 10:35:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:12,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:13,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:13,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338230636] [2022-04-06 10:35:13,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338230636] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354054413] [2022-04-06 10:35:13,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:35:13,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:13,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:13,058 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) [2022-04-06 10:35:13,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 10:35:13,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-06 10:35:13,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 10:35:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:13,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:14,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354054413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:14,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:14,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 10:35:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057990153] [2022-04-06 10:35:14,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:14,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 10:35:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 10:35:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=398, Unknown=0, NotChecked=0, Total=650 [2022-04-06 10:35:14,117 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:15,208 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-04-06 10:35:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 10:35:15,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 10:35:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:15,211 INFO L225 Difference]: With dead ends: 74 [2022-04-06 10:35:15,211 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 10:35:15,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=875, Invalid=1575, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 10:35:15,213 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 178 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:15,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 28 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:35:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 10:35:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 37. [2022-04-06 10:35:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-04-06 10:35:15,228 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 20 [2022-04-06 10:35:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:15,228 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-04-06 10:35:15,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-04-06 10:35:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 10:35:15,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:15,229 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:15,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 10:35:15,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:15,444 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:15,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1297464928, now seen corresponding path program 3 times [2022-04-06 10:35:15,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:15,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464915491] [2022-04-06 10:35:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:15,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:15,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:15,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464915491] [2022-04-06 10:35:15,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464915491] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:15,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443163876] [2022-04-06 10:35:15,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:35:15,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:15,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:15,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 10:35:15,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-04-06 10:35:15,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:15,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 10:35:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:16,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443163876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:17,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:17,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2022-04-06 10:35:17,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791602137] [2022-04-06 10:35:17,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:17,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 10:35:17,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 10:35:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 10:35:17,409 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:18,769 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2022-04-06 10:35:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 10:35:18,770 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 10:35:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:18,770 INFO L225 Difference]: With dead ends: 78 [2022-04-06 10:35:18,770 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 10:35:18,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 15 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 10:35:18,773 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:18,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 38 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 10:35:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 10:35:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-04-06 10:35:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-04-06 10:35:18,783 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2022-04-06 10:35:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:18,784 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-04-06 10:35:18,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-04-06 10:35:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 10:35:18,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:18,785 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:18,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 10:35:18,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:18,989 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash -41988390, now seen corresponding path program 4 times [2022-04-06 10:35:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:18,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587344776] [2022-04-06 10:35:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:18,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:19,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:19,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:19,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587344776] [2022-04-06 10:35:19,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587344776] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:19,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947649022] [2022-04-06 10:35:19,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:35:19,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:19,458 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:19,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 10:35:19,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:35:19,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 10:35:19,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:20,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:22,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947649022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:22,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:22,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 10:35:22,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011624492] [2022-04-06 10:35:22,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:22,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 10:35:22,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 10:35:22,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1068, Invalid=1382, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 10:35:22,261 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:25,138 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2022-04-06 10:35:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 10:35:25,139 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 10:35:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:25,140 INFO L225 Difference]: With dead ends: 134 [2022-04-06 10:35:25,140 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 10:35:25,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 21 SyntacticMatches, 21 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3467, Invalid=6039, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 10:35:25,143 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 295 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:25,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 53 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 10:35:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 10:35:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 61. [2022-04-06 10:35:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 57 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-04-06 10:35:25,157 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 32 [2022-04-06 10:35:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:25,158 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-04-06 10:35:25,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-04-06 10:35:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 10:35:25,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:25,159 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:25,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 10:35:25,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:25,368 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash 275505056, now seen corresponding path program 4 times [2022-04-06 10:35:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:25,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550678535] [2022-04-06 10:35:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:25,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:25,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:25,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550678535] [2022-04-06 10:35:25,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550678535] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579767256] [2022-04-06 10:35:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:35:25,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:25,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:25,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 10:35:26,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:35:26,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:35:26,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 10:35:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:35:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:26,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:35:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:30,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579767256] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:35:30,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:35:30,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 65 [2022-04-06 10:35:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861303439] [2022-04-06 10:35:30,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:35:30,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 10:35:30,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:35:30,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 10:35:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 10:35:30,443 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:35:34,047 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2022-04-06 10:35:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 10:35:34,048 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 10:35:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:35:34,048 INFO L225 Difference]: With dead ends: 142 [2022-04-06 10:35:34,048 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 10:35:34,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 23 SyntacticMatches, 31 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 10:35:34,053 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 264 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 10:35:34,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 33 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 10:35:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 10:35:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2022-04-06 10:35:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.25) internal successors, (90), 73 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2022-04-06 10:35:34,068 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 41 [2022-04-06 10:35:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:35:34,069 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2022-04-06 10:35:34,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:35:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2022-04-06 10:35:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 10:35:34,070 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:35:34,070 INFO L499 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:35:34,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 10:35:34,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 10:35:34,275 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:35:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:35:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1851342374, now seen corresponding path program 5 times [2022-04-06 10:35:34,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:35:34,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901285870] [2022-04-06 10:35:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:35:34,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:35:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:35,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:35:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:35:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:35:35,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:35:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901285870] [2022-04-06 10:35:35,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901285870] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:35:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245412763] [2022-04-06 10:35:35,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:35:35,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:35:35,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:35:35,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:35:35,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process