/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 21:20:50,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 21:20:50,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 21:20:50,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 21:20:50,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 21:20:50,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 21:20:50,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 21:20:50,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 21:20:50,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 21:20:50,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 21:20:50,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 21:20:50,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 21:20:50,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 21:20:50,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 21:20:50,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 21:20:50,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 21:20:50,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 21:20:50,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 21:20:50,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 21:20:50,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 21:20:50,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 21:20:50,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 21:20:50,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 21:20:50,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 21:20:50,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 21:20:50,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 21:20:50,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 21:20:50,114 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 21:20:50,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 21:20:50,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 21:20:50,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 21:20:50,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 21:20:50,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 21:20:50,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 21:20:50,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 21:20:50,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 21:20:50,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 21:20:50,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 21:20:50,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 21:20:50,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 21:20:50,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 21:20:50,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 21:20:50,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 21:20:50,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 21:20:50,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 21:20:50,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 21:20:50,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 21:20:50,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 21:20:50,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 21:20:50,118 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 21:20:50,118 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 21:20:50,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 21:20:50,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 21:20:50,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 21:20:50,314 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 21:20:50,314 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 21:20:50,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-02-23 21:20:50,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625382c4e/9ac0482e3f6640b1aea687b57fe698a2/FLAG405d58b6d [2022-02-23 21:20:50,654 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 21:20:50,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-02-23 21:20:50,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625382c4e/9ac0482e3f6640b1aea687b57fe698a2/FLAG405d58b6d [2022-02-23 21:20:51,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625382c4e/9ac0482e3f6640b1aea687b57fe698a2 [2022-02-23 21:20:51,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 21:20:51,108 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 21:20:51,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 21:20:51,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 21:20:51,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 21:20:51,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc0d8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51, skipping insertion in model container [2022-02-23 21:20:51,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 21:20:51,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 21:20:51,250 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c[318,331] [2022-02-23 21:20:51,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 21:20:51,278 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 21:20:51,289 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c[318,331] [2022-02-23 21:20:51,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 21:20:51,302 INFO L208 MainTranslator]: Completed translation [2022-02-23 21:20:51,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51 WrapperNode [2022-02-23 21:20:51,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 21:20:51,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 21:20:51,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 21:20:51,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 21:20:51,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 21:20:51,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 21:20:51,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 21:20:51,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 21:20:51,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 21:20:51,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:51,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 21:20:51,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 21:20:51,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 21:20:51,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 21:20:51,409 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 21:20:51,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 21:20:51,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 21:20:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 21:20:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 21:20:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 21:20:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 21:20:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 21:20:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 21:20:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 21:20:51,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 21:20:51,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 21:20:51,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 21:20:51,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 21:20:51,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 21:20:51,463 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 21:20:51,464 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 21:20:51,528 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 21:20:51,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 21:20:51,533 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 21:20:51,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:20:51 BoogieIcfgContainer [2022-02-23 21:20:51,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 21:20:51,535 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 21:20:51,535 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 21:20:51,536 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 21:20:51,538 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:20:51" (1/1) ... [2022-02-23 21:20:51,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 09:20:51 BasicIcfg [2022-02-23 21:20:51,550 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 21:20:51,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 21:20:51,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 21:20:51,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 21:20:51,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 09:20:51" (1/4) ... [2022-02-23 21:20:51,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc9c865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 09:20:51, skipping insertion in model container [2022-02-23 21:20:51,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:20:51" (2/4) ... [2022-02-23 21:20:51,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc9c865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 09:20:51, skipping insertion in model container [2022-02-23 21:20:51,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:20:51" (3/4) ... [2022-02-23 21:20:51,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc9c865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 09:20:51, skipping insertion in model container [2022-02-23 21:20:51,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 09:20:51" (4/4) ... [2022-02-23 21:20:51,556 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.cqvasr [2022-02-23 21:20:51,560 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 21:20:51,560 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 21:20:51,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 21:20:51,599 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 21:20:51,599 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 21:20:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 21:20:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 21:20:51,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:51,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:51,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash 447419557, now seen corresponding path program 1 times [2022-02-23 21:20:51,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:51,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76329398] [2022-02-23 21:20:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:51,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:51,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:51,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76329398] [2022-02-23 21:20:51,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76329398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:20:51,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:20:51,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 21:20:51,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752089763] [2022-02-23 21:20:51,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:20:51,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 21:20:51,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:51,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 21:20:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 21:20:51,808 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:51,858 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-02-23 21:20:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 21:20:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 21:20:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:51,865 INFO L225 Difference]: With dead ends: 33 [2022-02-23 21:20:51,865 INFO L226 Difference]: Without dead ends: 14 [2022-02-23 21:20:51,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 21:20:51,872 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:51,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:20:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-23 21:20:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-23 21:20:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-23 21:20:51,895 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-23 21:20:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:51,896 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-23 21:20:51,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-23 21:20:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 21:20:51,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:51,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:51,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 21:20:51,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash 448343078, now seen corresponding path program 1 times [2022-02-23 21:20:51,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:51,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439718020] [2022-02-23 21:20:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:51,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:52,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:52,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:52,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439718020] [2022-02-23 21:20:52,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439718020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:20:52,025 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:20:52,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 21:20:52,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388743245] [2022-02-23 21:20:52,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:20:52,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 21:20:52,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 21:20:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 21:20:52,027 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:52,065 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-02-23 21:20:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 21:20:52,066 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 21:20:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:52,066 INFO L225 Difference]: With dead ends: 25 [2022-02-23 21:20:52,067 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 21:20:52,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 21:20:52,069 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:52,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:20:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 21:20:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-02-23 21:20:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-23 21:20:52,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-02-23 21:20:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:52,075 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-23 21:20:52,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-23 21:20:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 21:20:52,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:52,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:52,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 21:20:52,076 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1516694440, now seen corresponding path program 1 times [2022-02-23 21:20:52,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:52,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596824643] [2022-02-23 21:20:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:52,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:52,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:52,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596824643] [2022-02-23 21:20:52,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596824643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:52,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942313420] [2022-02-23 21:20:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:52,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:52,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:52,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:20:52,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 21:20:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:52,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 21:20:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:52,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:20:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:52,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942313420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:20:52,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:20:52,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-02-23 21:20:52,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574184604] [2022-02-23 21:20:52,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:20:52,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 21:20:52,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 21:20:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-23 21:20:52,557 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:52,699 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-02-23 21:20:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 21:20:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 21:20:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:52,700 INFO L225 Difference]: With dead ends: 32 [2022-02-23 21:20:52,701 INFO L226 Difference]: Without dead ends: 24 [2022-02-23 21:20:52,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-02-23 21:20:52,702 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:52,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 28 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:20:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-23 21:20:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-23 21:20:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-02-23 21:20:52,708 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-02-23 21:20:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:52,708 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-02-23 21:20:52,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-02-23 21:20:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 21:20:52,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:52,711 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:52,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 21:20:52,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:52,926 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1579293370, now seen corresponding path program 1 times [2022-02-23 21:20:52,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:52,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480837621] [2022-02-23 21:20:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:52,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:53,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:20:53,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:53,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480837621] [2022-02-23 21:20:53,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480837621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:53,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404661799] [2022-02-23 21:20:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:53,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:53,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:53,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:20:53,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 21:20:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 21:20:53,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:20:53,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:20:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:20:53,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404661799] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:20:53,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:20:53,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-02-23 21:20:53,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209811077] [2022-02-23 21:20:53,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:20:53,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 21:20:53,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 21:20:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-02-23 21:20:53,358 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:53,557 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-02-23 21:20:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 21:20:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-23 21:20:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:53,559 INFO L225 Difference]: With dead ends: 44 [2022-02-23 21:20:53,559 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 21:20:53,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-02-23 21:20:53,561 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:53,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 38 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:20:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 21:20:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-02-23 21:20:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-23 21:20:53,568 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2022-02-23 21:20:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:53,568 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-23 21:20:53,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-23 21:20:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 21:20:53,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:53,569 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:53,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 21:20:53,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 21:20:53,787 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash -888303194, now seen corresponding path program 2 times [2022-02-23 21:20:53,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:53,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809499269] [2022-02-23 21:20:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:53,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:53,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:53,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:53,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809499269] [2022-02-23 21:20:53,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809499269] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:53,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887169207] [2022-02-23 21:20:53,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 21:20:53,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:53,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:53,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:20:53,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 21:20:54,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 21:20:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:20:54,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 21:20:54,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:54,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:20:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:54,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887169207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:20:54,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:20:54,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-02-23 21:20:54,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098360427] [2022-02-23 21:20:54,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:20:54,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 21:20:54,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:54,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 21:20:54,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-23 21:20:54,327 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:55,018 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-02-23 21:20:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 21:20:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-23 21:20:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:55,019 INFO L225 Difference]: With dead ends: 47 [2022-02-23 21:20:55,019 INFO L226 Difference]: Without dead ends: 42 [2022-02-23 21:20:55,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2022-02-23 21:20:55,021 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:55,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 43 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 21:20:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-23 21:20:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-23 21:20:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-02-23 21:20:55,029 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-02-23 21:20:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:55,029 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-02-23 21:20:55,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-02-23 21:20:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 21:20:55,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:55,031 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:55,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 21:20:55,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:55,254 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:55,254 INFO L85 PathProgramCache]: Analyzing trace with hash -443899610, now seen corresponding path program 2 times [2022-02-23 21:20:55,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:55,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539786085] [2022-02-23 21:20:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:55,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 21:20:55,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:55,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539786085] [2022-02-23 21:20:55,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539786085] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:55,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733761506] [2022-02-23 21:20:55,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 21:20:55,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:55,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:55,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:20:55,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 21:20:55,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 21:20:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:20:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 21:20:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 21:20:55,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:20:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 21:20:55,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733761506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:20:55,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:20:55,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 21:20:55,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544563285] [2022-02-23 21:20:55,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:20:55,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 21:20:55,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 21:20:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-23 21:20:55,784 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:56,851 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-02-23 21:20:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 21:20:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-23 21:20:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:56,853 INFO L225 Difference]: With dead ends: 76 [2022-02-23 21:20:56,853 INFO L226 Difference]: Without dead ends: 60 [2022-02-23 21:20:56,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-02-23 21:20:56,855 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:56,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 48 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 21:20:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-23 21:20:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-02-23 21:20:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-02-23 21:20:56,864 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 41 [2022-02-23 21:20:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:56,865 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-02-23 21:20:56,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-02-23 21:20:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 21:20:56,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:56,871 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:56,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 21:20:57,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:57,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash -556846618, now seen corresponding path program 3 times [2022-02-23 21:20:57,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:57,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6889174] [2022-02-23 21:20:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:57,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:57,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:57,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6889174] [2022-02-23 21:20:57,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6889174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:57,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391644062] [2022-02-23 21:20:57,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 21:20:57,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:57,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:57,382 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:20:57,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 21:20:57,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-23 21:20:57,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:20:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 21:20:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-02-23 21:20:57,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 21:20:57,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391644062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:20:57,556 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 21:20:57,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-02-23 21:20:57,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868207196] [2022-02-23 21:20:57,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:20:57,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 21:20:57,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 21:20:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-23 21:20:57,558 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 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) [2022-02-23 21:20:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:57,603 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-02-23 21:20:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 21:20:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 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 [2022-02-23 21:20:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:57,604 INFO L225 Difference]: With dead ends: 65 [2022-02-23 21:20:57,604 INFO L226 Difference]: Without dead ends: 60 [2022-02-23 21:20:57,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-23 21:20:57,605 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:57,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:20:57,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-23 21:20:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-02-23 21:20:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:20:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-02-23 21:20:57,614 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 41 [2022-02-23 21:20:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:57,614 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-02-23 21:20:57,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 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) [2022-02-23 21:20:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-02-23 21:20:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-23 21:20:57,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:57,615 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:57,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 21:20:57,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:57,838 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -236436009, now seen corresponding path program 3 times [2022-02-23 21:20:57,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:57,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385003448] [2022-02-23 21:20:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:58,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:20:58,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:58,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385003448] [2022-02-23 21:20:58,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385003448] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:58,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216219913] [2022-02-23 21:20:58,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 21:20:58,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:58,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:58,136 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) [2022-02-23 21:20:58,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 21:20:58,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 21:20:58,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:20:58,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 21:20:58,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-02-23 21:20:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:20:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-02-23 21:20:58,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216219913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:20:58,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:20:58,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 26 [2022-02-23 21:20:58,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501228286] [2022-02-23 21:20:58,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:20:58,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 21:20:58,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:20:58,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 21:20:58,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-02-23 21:20:58,624 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:21:00,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:21:00,005 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-02-23 21:21:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-23 21:21:00,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-23 21:21:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:21:00,007 INFO L225 Difference]: With dead ends: 89 [2022-02-23 21:21:00,007 INFO L226 Difference]: Without dead ends: 79 [2022-02-23 21:21:00,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2022-02-23 21:21:00,009 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 214 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 21:21:00,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 82 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 21:21:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-23 21:21:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-02-23 21:21:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 70 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:21:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-02-23 21:21:00,022 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 56 [2022-02-23 21:21:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:21:00,023 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-02-23 21:21:00,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:21:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-02-23 21:21:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-23 21:21:00,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:21:00,030 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:21:00,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 21:21:00,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:21:00,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:21:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:21:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1430063529, now seen corresponding path program 4 times [2022-02-23 21:21:00,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:21:00,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854583818] [2022-02-23 21:21:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:21:00,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:21:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:21:00,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:21:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:21:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:21:00,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:21:00,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854583818] [2022-02-23 21:21:00,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854583818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:21:00,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684270878] [2022-02-23 21:21:00,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 21:21:00,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:21:00,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:21:00,594 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) [2022-02-23 21:21:00,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 21:21:00,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 21:21:00,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:21:00,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-23 21:21:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:21:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:21:01,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:21:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:21:02,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684270878] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:21:02,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:21:02,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 24] total 47 [2022-02-23 21:21:02,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645659343] [2022-02-23 21:21:02,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:21:02,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-23 21:21:02,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:21:02,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-23 21:21:02,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2022-02-23 21:21:02,320 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:22:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:22:07,871 INFO L93 Difference]: Finished difference Result 175 states and 211 transitions. [2022-02-23 21:22:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-23 21:22:07,871 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-23 21:22:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:22:07,873 INFO L225 Difference]: With dead ends: 175 [2022-02-23 21:22:07,873 INFO L226 Difference]: Without dead ends: 153 [2022-02-23 21:22:07,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=2121, Invalid=5710, Unknown=1, NotChecked=0, Total=7832 [2022-02-23 21:22:07,876 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 317 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 21:22:07,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 134 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 21:22:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-23 21:22:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-02-23 21:22:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:22:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2022-02-23 21:22:07,891 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 74 [2022-02-23 21:22:07,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:22:07,892 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2022-02-23 21:22:07,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:22:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2022-02-23 21:22:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-23 21:22:07,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:22:07,893 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 42, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:22:07,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 21:22:08,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:22:08,108 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:22:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:22:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1642783383, now seen corresponding path program 5 times [2022-02-23 21:22:08,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:22:08,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265941217] [2022-02-23 21:22:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:22:08,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:22:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:22:09,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:22:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:22:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 597 proven. 2667 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:22:09,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:22:09,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265941217] [2022-02-23 21:22:09,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265941217] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:22:09,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361308901] [2022-02-23 21:22:09,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 21:22:09,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:22:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:22:09,168 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) [2022-02-23 21:22:09,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 21:25:52,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2022-02-23 21:25:52,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:25:52,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 98 conjunts are in the unsatisfiable core [2022-02-23 21:25:52,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:25:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:25:54,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:25:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:25:59,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361308901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:25:59,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:25:59,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 50, 50] total 142 [2022-02-23 21:25:59,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718601284] [2022-02-23 21:25:59,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:25:59,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-23 21:25:59,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:25:59,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-23 21:25:59,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4778, Invalid=15244, Unknown=0, NotChecked=0, Total=20022 [2022-02-23 21:25:59,593 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 142 states, 142 states have (on average 2.964788732394366) internal successors, (421), 141 states have internal predecessors, (421), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 21:26:05,507 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~y~0 4294967296))) (and (let ((.cse0 (mod (+ 38 c_main_~x~0) 4294967296))) (or (not (< .cse0 .cse1)) (not (<= 5000000 .cse0)))) (let ((.cse2 (mod (+ 2 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse2)) (not (< .cse2 .cse1)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (let ((.cse3 (mod (+ 3 c_main_~x~0) 4294967296))) (or (not (< .cse3 .cse1)) (not (<= 5000000 .cse3)))) (let ((.cse4 (mod (+ c_main_~x~0 24) 4294967296))) (or (not (<= 5000000 .cse4)) (not (< .cse4 .cse1)))) (let ((.cse5 (mod (+ 31 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse5)) (not (< .cse5 .cse1)))) (let ((.cse6 (mod (+ 32 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse6)) (not (< .cse6 .cse1)))) (let ((.cse7 (mod (+ 9 c_main_~x~0) 4294967296))) (or (not (< .cse7 .cse1)) (not (<= 5000000 .cse7)))) (let ((.cse8 (mod (+ 45 c_main_~x~0) 4294967296))) (or (not (< .cse8 .cse1)) (not (<= 5000000 .cse8)))) (let ((.cse9 (mod (+ 20 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse9)) (not (< .cse9 .cse1)))) (let ((.cse10 (mod (+ 40 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse10)) (not (< .cse10 .cse1)))) (let ((.cse11 (mod (+ 10 c_main_~x~0) 4294967296))) (or (not (< .cse11 .cse1)) (not (<= 5000000 .cse11)))) (let ((.cse12 (mod (+ 15 c_main_~x~0) 4294967296))) (or (not (< .cse12 .cse1)) (not (<= 5000000 .cse12)))) (let ((.cse13 (mod (+ 41 c_main_~x~0) 4294967296))) (or (not (< .cse13 .cse1)) (not (<= 5000000 .cse13)))) (let ((.cse14 (mod (+ 6 c_main_~x~0) 4294967296))) (or (not (< .cse14 .cse1)) (not (<= 5000000 .cse14)))) (let ((.cse15 (mod (+ 30 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse15)) (not (< .cse15 .cse1)))) (let ((.cse16 (mod (+ 36 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse16)) (not (< .cse16 .cse1)))) (let ((.cse17 (mod (+ 21 c_main_~x~0) 4294967296))) (or (not (< .cse17 .cse1)) (not (<= 5000000 .cse17)))) (let ((.cse18 (mod (+ 22 c_main_~x~0) 4294967296))) (or (not (< .cse18 .cse1)) (not (<= 5000000 .cse18)))) (let ((.cse19 (mod (+ 25 c_main_~x~0) 4294967296))) (or (not (< .cse19 .cse1)) (not (<= 5000000 .cse19)))) (let ((.cse20 (mod (+ 34 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse20)) (not (< .cse20 .cse1)))) (let ((.cse21 (mod (+ 35 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse21)) (not (< .cse21 .cse1)))) (let ((.cse22 (mod (+ 14 c_main_~x~0) 4294967296))) (or (not (< .cse22 .cse1)) (not (<= 5000000 .cse22)))) (let ((.cse23 (mod (+ 43 c_main_~x~0) 4294967296))) (or (not (< .cse23 .cse1)) (not (<= 5000000 .cse23)))) (let ((.cse24 (mod (+ 39 c_main_~x~0) 4294967296))) (or (not (< .cse24 .cse1)) (not (<= 5000000 .cse24)))) (let ((.cse25 (mod (+ 13 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse25)) (not (< .cse25 .cse1)))) (let ((.cse26 (mod (+ c_main_~x~0 27) 4294967296))) (or (not (< .cse26 .cse1)) (not (<= 5000000 .cse26)))) (let ((.cse27 (mod (+ c_main_~x~0 11) 4294967296))) (or (not (< .cse27 .cse1)) (not (<= 5000000 .cse27)))) (let ((.cse28 (mod (+ 33 c_main_~x~0) 4294967296))) (or (not (< .cse28 .cse1)) (not (<= 5000000 .cse28)))) (let ((.cse29 (mod (+ 42 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse29)) (not (< .cse29 .cse1)))) (let ((.cse30 (mod (+ 12 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse30)) (not (< .cse30 .cse1)))) (let ((.cse31 (mod (+ 4 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse31)) (not (< .cse31 .cse1)))) (let ((.cse32 (mod (+ 16 c_main_~x~0) 4294967296))) (or (not (< .cse32 .cse1)) (not (<= 5000000 .cse32)))) (let ((.cse33 (mod (+ 23 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse33)) (not (< .cse33 .cse1)))) (let ((.cse34 (mod (+ 17 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse34)) (not (< .cse34 .cse1)))) (let ((.cse35 (mod (+ c_main_~x~0 1) 4294967296))) (or (not (<= 5000000 .cse35)) (not (< .cse35 .cse1)))) (let ((.cse36 (mod (+ 19 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse36)) (not (< .cse36 .cse1)))) (let ((.cse37 (mod (+ 26 c_main_~x~0) 4294967296))) (or (not (< .cse37 .cse1)) (not (<= 5000000 .cse37)))) (let ((.cse38 (mod (+ 29 c_main_~x~0) 4294967296))) (or (not (< .cse38 .cse1)) (not (<= 5000000 .cse38)))) (not (<= 5000000 (mod c_main_~x~0 4294967296))) (let ((.cse39 (mod (+ 8 c_main_~x~0) 4294967296))) (or (not (< .cse39 .cse1)) (not (<= 5000000 .cse39)))) (let ((.cse40 (mod (+ 7 c_main_~x~0) 4294967296))) (or (not (< .cse40 .cse1)) (not (<= 5000000 .cse40)))) (let ((.cse41 (mod (+ 44 c_main_~x~0) 4294967296))) (or (not (< .cse41 .cse1)) (not (<= 5000000 .cse41)))) (let ((.cse42 (mod (+ c_main_~x~0 37) 4294967296))) (or (not (< .cse42 .cse1)) (not (<= 5000000 .cse42)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (let ((.cse43 (mod (+ 5 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse43)) (not (< .cse43 .cse1)))) (let ((.cse44 (mod (+ 28 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse44)) (not (< .cse44 .cse1)))) (let ((.cse45 (mod (+ 18 c_main_~x~0) 4294967296))) (or (not (< .cse45 .cse1)) (not (<= 5000000 .cse45)))) (let ((.cse46 (mod (+ 46 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse46)) (not (< .cse46 .cse1)))))) is different from false [2022-02-23 21:26:07,524 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~y~0 4294967296))) (and (let ((.cse0 (mod (+ 38 c_main_~x~0) 4294967296))) (or (not (< .cse0 .cse1)) (not (<= 5000000 .cse0)))) (let ((.cse2 (mod (+ 2 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse2)) (not (< .cse2 .cse1)))) (let ((.cse3 (mod (+ 3 c_main_~x~0) 4294967296))) (or (not (< .cse3 .cse1)) (not (<= 5000000 .cse3)))) (let ((.cse4 (mod (+ c_main_~x~0 24) 4294967296))) (or (not (<= 5000000 .cse4)) (not (< .cse4 .cse1)))) (let ((.cse5 (mod (+ 31 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse5)) (not (< .cse5 .cse1)))) (let ((.cse6 (mod (+ 32 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse6)) (not (< .cse6 .cse1)))) (let ((.cse7 (mod (+ 9 c_main_~x~0) 4294967296))) (or (not (< .cse7 .cse1)) (not (<= 5000000 .cse7)))) (let ((.cse8 (mod (+ 45 c_main_~x~0) 4294967296))) (or (not (< .cse8 .cse1)) (not (<= 5000000 .cse8)))) (let ((.cse9 (mod (+ 20 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse9)) (not (< .cse9 .cse1)))) (let ((.cse10 (mod (+ 40 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse10)) (not (< .cse10 .cse1)))) (let ((.cse11 (mod (+ 10 c_main_~x~0) 4294967296))) (or (not (< .cse11 .cse1)) (not (<= 5000000 .cse11)))) (let ((.cse12 (mod (+ 15 c_main_~x~0) 4294967296))) (or (not (< .cse12 .cse1)) (not (<= 5000000 .cse12)))) (let ((.cse13 (mod (+ 41 c_main_~x~0) 4294967296))) (or (not (< .cse13 .cse1)) (not (<= 5000000 .cse13)))) (let ((.cse14 (mod (+ 6 c_main_~x~0) 4294967296))) (or (not (< .cse14 .cse1)) (not (<= 5000000 .cse14)))) (let ((.cse15 (mod (+ 30 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse15)) (not (< .cse15 .cse1)))) (let ((.cse16 (mod (+ 36 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse16)) (not (< .cse16 .cse1)))) (let ((.cse17 (mod (+ 21 c_main_~x~0) 4294967296))) (or (not (< .cse17 .cse1)) (not (<= 5000000 .cse17)))) (let ((.cse18 (mod (+ 22 c_main_~x~0) 4294967296))) (or (not (< .cse18 .cse1)) (not (<= 5000000 .cse18)))) (let ((.cse19 (mod (+ 25 c_main_~x~0) 4294967296))) (or (not (< .cse19 .cse1)) (not (<= 5000000 .cse19)))) (let ((.cse20 (mod (+ 34 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse20)) (not (< .cse20 .cse1)))) (let ((.cse21 (mod (+ 35 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse21)) (not (< .cse21 .cse1)))) (let ((.cse22 (mod (+ 14 c_main_~x~0) 4294967296))) (or (not (< .cse22 .cse1)) (not (<= 5000000 .cse22)))) (let ((.cse23 (mod (+ 43 c_main_~x~0) 4294967296))) (or (not (< .cse23 .cse1)) (not (<= 5000000 .cse23)))) (let ((.cse24 (mod (+ 39 c_main_~x~0) 4294967296))) (or (not (< .cse24 .cse1)) (not (<= 5000000 .cse24)))) (let ((.cse25 (mod (+ 13 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse25)) (not (< .cse25 .cse1)))) (let ((.cse26 (mod (+ c_main_~x~0 27) 4294967296))) (or (not (< .cse26 .cse1)) (not (<= 5000000 .cse26)))) (let ((.cse27 (mod (+ c_main_~x~0 11) 4294967296))) (or (not (< .cse27 .cse1)) (not (<= 5000000 .cse27)))) (let ((.cse28 (mod (+ 33 c_main_~x~0) 4294967296))) (or (not (< .cse28 .cse1)) (not (<= 5000000 .cse28)))) (let ((.cse29 (mod (+ 42 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse29)) (not (< .cse29 .cse1)))) (let ((.cse30 (mod (+ 12 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse30)) (not (< .cse30 .cse1)))) (let ((.cse31 (mod (+ 4 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse31)) (not (< .cse31 .cse1)))) (let ((.cse32 (mod (+ 16 c_main_~x~0) 4294967296))) (or (not (< .cse32 .cse1)) (not (<= 5000000 .cse32)))) (let ((.cse33 (mod (+ 23 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse33)) (not (< .cse33 .cse1)))) (let ((.cse34 (mod (+ 17 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse34)) (not (< .cse34 .cse1)))) (let ((.cse35 (mod (+ c_main_~x~0 1) 4294967296))) (or (not (<= 5000000 .cse35)) (not (< .cse35 .cse1)))) (let ((.cse36 (mod (+ 19 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse36)) (not (< .cse36 .cse1)))) (let ((.cse37 (mod (+ 26 c_main_~x~0) 4294967296))) (or (not (< .cse37 .cse1)) (not (<= 5000000 .cse37)))) (let ((.cse38 (mod (+ 29 c_main_~x~0) 4294967296))) (or (not (< .cse38 .cse1)) (not (<= 5000000 .cse38)))) (not (<= 5000000 (mod c_main_~x~0 4294967296))) (let ((.cse39 (mod (+ 8 c_main_~x~0) 4294967296))) (or (not (< .cse39 .cse1)) (not (<= 5000000 .cse39)))) (let ((.cse40 (mod (+ 7 c_main_~x~0) 4294967296))) (or (not (< .cse40 .cse1)) (not (<= 5000000 .cse40)))) (let ((.cse41 (mod (+ 44 c_main_~x~0) 4294967296))) (or (not (< .cse41 .cse1)) (not (<= 5000000 .cse41)))) (let ((.cse42 (mod (+ c_main_~x~0 37) 4294967296))) (or (not (< .cse42 .cse1)) (not (<= 5000000 .cse42)))) (let ((.cse43 (mod (+ 5 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse43)) (not (< .cse43 .cse1)))) (let ((.cse44 (mod (+ 28 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse44)) (not (< .cse44 .cse1)))) (let ((.cse45 (mod (+ 18 c_main_~x~0) 4294967296))) (or (not (< .cse45 .cse1)) (not (<= 5000000 .cse45)))) (let ((.cse46 (mod (+ 46 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse46)) (not (< .cse46 .cse1)))))) is different from false [2022-02-23 21:35:11,315 WARN L232 SmtUtils]: Spent 7.91m on a formula simplification that was a NOOP. DAG size: 342 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 21:35:13,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 21:35:15,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 21:35:17,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 21:35:19,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 21:35:21,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 21:35:23,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []