/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 02:15:28,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 02:15:28,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 02:15:28,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 02:15:28,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 02:15:28,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 02:15:28,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 02:15:28,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 02:15:28,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 02:15:28,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 02:15:28,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 02:15:28,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 02:15:28,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 02:15:28,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 02:15:28,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 02:15:28,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 02:15:28,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 02:15:28,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 02:15:28,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 02:15:28,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 02:15:28,419 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 02:15:28,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 02:15:28,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 02:15:28,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 02:15:28,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 02:15:28,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 02:15:28,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 02:15:28,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 02:15:28,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 02:15:28,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 02:15:28,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 02:15:28,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 02:15:28,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 02:15:28,453 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 02:15:28,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 02:15:28,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 02:15:28,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 02:15:28,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 02:15:28,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 02:15:28,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 02:15:28,454 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 02:15:28,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 02:15:28,454 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 02:15:28,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 02:15:28,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 02:15:28,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 02:15:28,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 02:15:28,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 02:15:28,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:15:28,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 02:15:28,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 02:15:28,456 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 02:15:28,457 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 02:15:28,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 02:15:28,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 02:15:28,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 02:15:28,704 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 02:15:28,704 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 02:15:28,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2022-04-05 02:15:28,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f92569b/adf736a6ef274cc6973d0c0892b4bfef/FLAG005594f51 [2022-04-05 02:15:29,181 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 02:15:29,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2022-04-05 02:15:29,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f92569b/adf736a6ef274cc6973d0c0892b4bfef/FLAG005594f51 [2022-04-05 02:15:29,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f92569b/adf736a6ef274cc6973d0c0892b4bfef [2022-04-05 02:15:29,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 02:15:29,576 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 02:15:29,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 02:15:29,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 02:15:29,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 02:15:29,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@93ab441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29, skipping insertion in model container [2022-04-05 02:15:29,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 02:15:29,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 02:15:29,777 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2022-04-05 02:15:29,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:15:29,806 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 02:15:29,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i[950,963] [2022-04-05 02:15:29,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:15:29,830 INFO L208 MainTranslator]: Completed translation [2022-04-05 02:15:29,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29 WrapperNode [2022-04-05 02:15:29,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 02:15:29,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 02:15:29,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 02:15:29,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 02:15:29,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 02:15:29,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 02:15:29,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 02:15:29,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 02:15:29,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (1/1) ... [2022-04-05 02:15:29,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:15:29,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:29,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 02:15:29,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 02:15:29,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 02:15:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 02:15:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 02:15:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 02:15:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 02:15:29,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 02:15:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 02:15:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 02:15:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 02:15:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 02:15:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 02:15:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 02:15:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 02:15:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 02:15:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 02:15:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 02:15:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 02:15:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 02:15:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 02:15:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 02:15:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 02:15:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 02:15:30,019 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 02:15:30,021 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 02:15:30,197 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 02:15:30,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 02:15:30,206 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 02:15:30,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:15:30 BoogieIcfgContainer [2022-04-05 02:15:30,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 02:15:30,209 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 02:15:30,209 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 02:15:30,210 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 02:15:30,212 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:15:30" (1/1) ... [2022-04-05 02:15:30,214 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 02:15:30,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:15:30 BasicIcfg [2022-04-05 02:15:30,247 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 02:15:30,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 02:15:30,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 02:15:30,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 02:15:30,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 02:15:29" (1/4) ... [2022-04-05 02:15:30,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4b7ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:15:30, skipping insertion in model container [2022-04-05 02:15:30,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:15:29" (2/4) ... [2022-04-05 02:15:30,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4b7ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:15:30, skipping insertion in model container [2022-04-05 02:15:30,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:15:30" (3/4) ... [2022-04-05 02:15:30,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4b7ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:15:30, skipping insertion in model container [2022-04-05 02:15:30,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:15:30" (4/4) ... [2022-04-05 02:15:30,272 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.iJordan [2022-04-05 02:15:30,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 02:15:30,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 02:15:30,334 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 02:15:30,344 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 02:15:30,344 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 02:15:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 02:15:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 02:15:30,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:30,378 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:30,379 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2022-04-05 02:15:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:30,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394653922] [2022-04-05 02:15:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:30,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:30,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 02:15:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 02:15:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:30,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 02:15:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394653922] [2022-04-05 02:15:30,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394653922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:15:30,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:15:30,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:15:30,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702547251] [2022-04-05 02:15:30,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:15:30,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:15:30,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:15:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:15:30,669 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:15:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:30,754 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-05 02:15:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:15:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 02:15:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:30,768 INFO L225 Difference]: With dead ends: 34 [2022-04-05 02:15:30,768 INFO L226 Difference]: Without dead ends: 29 [2022-04-05 02:15:30,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:15:30,774 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:30,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:15:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-05 02:15:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-05 02:15:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 02:15:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-04-05 02:15:30,815 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2022-04-05 02:15:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:30,815 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-04-05 02:15:30,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:15:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-05 02:15:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 02:15:30,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:30,817 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:30,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 02:15:30,818 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2022-04-05 02:15:30,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:30,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207868058] [2022-04-05 02:15:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:30,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:30,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:30,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879072894] [2022-04-05 02:15:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:30,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:30,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:30,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:30,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 02:15:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 02:15:30,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:15:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:31,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:15:31,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:31,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207868058] [2022-04-05 02:15:31,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:15:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879072894] [2022-04-05 02:15:31,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879072894] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:15:31,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:15:31,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 02:15:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599153452] [2022-04-05 02:15:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:15:31,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 02:15:31,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 02:15:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:15:31,093 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:15:31,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:31,103 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-04-05 02:15:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 02:15:31,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-04-05 02:15:31,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:31,104 INFO L225 Difference]: With dead ends: 30 [2022-04-05 02:15:31,105 INFO L226 Difference]: Without dead ends: 30 [2022-04-05 02:15:31,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:15:31,106 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:31,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:15:31,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-05 02:15:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-05 02:15:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 02:15:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-04-05 02:15:31,112 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2022-04-05 02:15:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:31,113 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-04-05 02:15:31,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:15:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-04-05 02:15:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 02:15:31,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:31,115 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:31,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 02:15:31,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:31,328 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2022-04-05 02:15:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:31,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388191172] [2022-04-05 02:15:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:31,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:31,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743767443] [2022-04-05 02:15:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:31,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:31,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:31,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:31,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 02:15:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:31,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:15:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:15:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:31,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:15:31,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:31,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388191172] [2022-04-05 02:15:31,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:15:31,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743767443] [2022-04-05 02:15:31,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743767443] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:15:31,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:15:31,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:15:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084236238] [2022-04-05 02:15:31,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:15:31,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:15:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:31,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:15:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:15:31,563 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:15:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:31,586 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-04-05 02:15:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:15:31,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-04-05 02:15:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:31,587 INFO L225 Difference]: With dead ends: 34 [2022-04-05 02:15:31,588 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 02:15:31,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:15:31,589 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:31,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:15:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 02:15:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-05 02:15:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 02:15:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-04-05 02:15:31,594 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2022-04-05 02:15:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:31,595 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-04-05 02:15:31,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:15:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-04-05 02:15:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 02:15:31,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:31,596 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:31,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 02:15:31,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 02:15:31,816 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2022-04-05 02:15:31,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:31,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336862348] [2022-04-05 02:15:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:31,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:31,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:31,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110090226] [2022-04-05 02:15:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:31,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:31,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:31,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 02:15:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:31,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 02:15:31,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:15:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 02:15:32,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:15:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:32,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:32,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336862348] [2022-04-05 02:15:32,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:15:32,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110090226] [2022-04-05 02:15:32,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110090226] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:15:32,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:15:32,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-05 02:15:32,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995615818] [2022-04-05 02:15:32,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:15:32,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:15:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:15:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:15:32,582 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:15:34,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:15:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:34,801 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-04-05 02:15:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:15:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-04-05 02:15:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:34,803 INFO L225 Difference]: With dead ends: 40 [2022-04-05 02:15:34,803 INFO L226 Difference]: Without dead ends: 39 [2022-04-05 02:15:34,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:15:34,804 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:34,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 104 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 02:15:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-05 02:15:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-05 02:15:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 02:15:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-04-05 02:15:34,810 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-04-05 02:15:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:34,810 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-04-05 02:15:34,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:15:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-04-05 02:15:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 02:15:34,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:34,812 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:34,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 02:15:35,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:35,013 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:35,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2022-04-05 02:15:35,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:35,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014020073] [2022-04-05 02:15:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:35,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:35,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:35,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739595769] [2022-04-05 02:15:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:35,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:35,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:35,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:35,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 02:15:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:35,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:15:35,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:15:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:35,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:15:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:35,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:35,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014020073] [2022-04-05 02:15:35,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:15:35,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739595769] [2022-04-05 02:15:35,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739595769] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:15:35,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:15:35,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 02:15:35,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207419560] [2022-04-05 02:15:35,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:15:35,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 02:15:35,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:35,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 02:15:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 02:15:35,317 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:15:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:35,424 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-04-05 02:15:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 02:15:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2022-04-05 02:15:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:35,426 INFO L225 Difference]: With dead ends: 61 [2022-04-05 02:15:35,426 INFO L226 Difference]: Without dead ends: 61 [2022-04-05 02:15:35,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:15:35,427 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:35,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 157 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:15:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-05 02:15:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2022-04-05 02:15:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 02:15:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-04-05 02:15:35,434 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 28 [2022-04-05 02:15:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:35,434 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-04-05 02:15:35,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:15:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-04-05 02:15:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 02:15:35,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:35,436 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:35,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 02:15:35,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:35,644 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2022-04-05 02:15:35,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:35,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042250009] [2022-04-05 02:15:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:35,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:35,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:35,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641947876] [2022-04-05 02:15:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:35,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:35,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:35,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 02:15:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:15:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:15:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:35,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:15:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:35,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:35,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042250009] [2022-04-05 02:15:35,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:15:35,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641947876] [2022-04-05 02:15:35,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641947876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:15:35,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:15:35,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 02:15:35,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668351587] [2022-04-05 02:15:35,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:15:35,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 02:15:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:35,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 02:15:35,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:15:35,919 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:15:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:36,069 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-04-05 02:15:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 02:15:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-04-05 02:15:36,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:36,073 INFO L225 Difference]: With dead ends: 91 [2022-04-05 02:15:36,073 INFO L226 Difference]: Without dead ends: 91 [2022-04-05 02:15:36,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:15:36,074 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 74 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:36,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 185 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:15:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-05 02:15:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-04-05 02:15:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 67 states have internal predecessors, (85), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 02:15:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-04-05 02:15:36,082 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 29 [2022-04-05 02:15:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:36,083 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-04-05 02:15:36,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:15:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-04-05 02:15:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 02:15:36,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:36,084 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:36,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 02:15:36,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:36,286 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2022-04-05 02:15:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:36,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607969817] [2022-04-05 02:15:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:36,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:36,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:36,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044952489] [2022-04-05 02:15:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:36,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:36,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:36,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:36,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 02:15:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:36,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 02:15:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:15:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 02:15:36,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:15:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:36,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:36,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607969817] [2022-04-05 02:15:36,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:15:36,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044952489] [2022-04-05 02:15:36,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044952489] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:15:36,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:15:36,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-05 02:15:36,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731914939] [2022-04-05 02:15:36,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:15:36,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:15:36,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:15:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:15:36,926 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:15:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:36,960 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2022-04-05 02:15:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:15:36,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-04-05 02:15:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:36,965 INFO L225 Difference]: With dead ends: 115 [2022-04-05 02:15:36,965 INFO L226 Difference]: Without dead ends: 115 [2022-04-05 02:15:36,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:15:36,966 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:36,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-04-05 02:15:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-05 02:15:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-04-05 02:15:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 02:15:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-04-05 02:15:36,977 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 29 [2022-04-05 02:15:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:36,978 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-04-05 02:15:36,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:15:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-04-05 02:15:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 02:15:36,979 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:36,979 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:37,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-05 02:15:37,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:37,207 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:37,207 INFO L85 PathProgramCache]: Analyzing trace with hash -665062919, now seen corresponding path program 1 times [2022-04-05 02:15:37,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:37,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048691715] [2022-04-05 02:15:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:37,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:37,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:37,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991707620] [2022-04-05 02:15:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:37,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:37,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:37,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:37,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 02:15:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:37,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 02:15:37,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:15:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:15:37,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:15:37,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:37,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048691715] [2022-04-05 02:15:37,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:15:37,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991707620] [2022-04-05 02:15:37,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991707620] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:15:37,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:15:37,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:15:37,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106667800] [2022-04-05 02:15:37,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:15:37,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:15:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:15:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:15:37,341 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 02:15:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:37,370 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-04-05 02:15:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:15:37,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-04-05 02:15:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:37,372 INFO L225 Difference]: With dead ends: 110 [2022-04-05 02:15:37,372 INFO L226 Difference]: Without dead ends: 100 [2022-04-05 02:15:37,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:15:37,373 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:37,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:15:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-05 02:15:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-05 02:15:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 81 states have internal predecessors, (95), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 02:15:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2022-04-05 02:15:37,382 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 35 [2022-04-05 02:15:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:37,383 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2022-04-05 02:15:37,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 02:15:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2022-04-05 02:15:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 02:15:37,384 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:37,384 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:37,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 02:15:37,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:37,604 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:37,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1800746756, now seen corresponding path program 1 times [2022-04-05 02:15:37,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:37,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852992686] [2022-04-05 02:15:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:37,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:37,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:37,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702336172] [2022-04-05 02:15:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:37,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:37,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:37,632 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:37,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 02:15:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:15:37,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 02:15:37,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:15:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 02:15:37,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:15:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 02:15:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:15:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852992686] [2022-04-05 02:15:37,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:15:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702336172] [2022-04-05 02:15:37,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702336172] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:15:37,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:15:37,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-05 02:15:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773315218] [2022-04-05 02:15:37,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:15:37,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 02:15:37,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:15:37,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 02:15:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-05 02:15:37,925 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-05 02:15:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:15:38,061 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2022-04-05 02:15:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 02:15:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-04-05 02:15:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:15:38,063 INFO L225 Difference]: With dead ends: 113 [2022-04-05 02:15:38,063 INFO L226 Difference]: Without dead ends: 95 [2022-04-05 02:15:38,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:15:38,064 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:15:38,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 125 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:15:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-05 02:15:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-04-05 02:15:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 02:15:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-04-05 02:15:38,071 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 35 [2022-04-05 02:15:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:15:38,071 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-04-05 02:15:38,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-05 02:15:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-04-05 02:15:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 02:15:38,072 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:15:38,072 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:15:38,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 02:15:38,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 02:15:38,292 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:15:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:15:38,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1291395213, now seen corresponding path program 1 times [2022-04-05 02:15:38,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:15:38,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912609731] [2022-04-05 02:15:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:38,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:15:38,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:15:38,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923611828] [2022-04-05 02:15:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:15:38,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:15:38,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:15:38,312 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:15:38,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process