/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/array-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:08:28,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:08:28,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:08:28,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:08:28,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:08:28,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:08:28,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:08:28,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:08:28,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:08:28,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:08:28,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:08:28,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:08:28,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:08:28,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:08:28,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:08:28,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:08:28,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:08:28,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:08:28,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:08:28,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:08:28,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:08:28,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:08:28,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:08:28,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:08:28,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:08:28,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:08:28,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:08:28,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:08:28,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:08:28,126 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:08:28,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:08:28,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:08:28,127 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:08:28,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:08:28,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:08:28,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:08:28,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:08:28,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:08:28,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:08:28,128 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:08:28,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:08:28,128 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:08:28,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:08:28,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:08:28,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:08:28,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:08:28,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:08:28,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:08:28,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:08:28,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:08:28,129 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:08:28,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:08:28,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:08:28,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:08:28,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:08:28,330 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:08:28,331 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:08:28,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2022-01-31 08:08:28,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723eaf882/079ba9ef99eb4598b66c99fb067d5d4f/FLAG448caf590 [2022-01-31 08:08:28,682 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:08:28,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2022-01-31 08:08:28,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723eaf882/079ba9ef99eb4598b66c99fb067d5d4f/FLAG448caf590 [2022-01-31 08:08:29,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723eaf882/079ba9ef99eb4598b66c99fb067d5d4f [2022-01-31 08:08:29,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:08:29,117 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:08:29,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:08:29,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:08:29,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:08:29,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a76b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29, skipping insertion in model container [2022-01-31 08:08:29,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:08:29,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:08:29,269 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i[814,827] [2022-01-31 08:08:29,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:08:29,282 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:08:29,289 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i[814,827] [2022-01-31 08:08:29,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:08:29,299 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:08:29,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29 WrapperNode [2022-01-31 08:08:29,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:08:29,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:08:29,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:08:29,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:08:29,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:08:29,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:08:29,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:08:29,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:08:29,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:08:29,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:29,337 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) [2022-01-31 08:08:29,353 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 [2022-01-31 08:08:29,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:08:29,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:08:29,369 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:08:29,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:08:29,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:08:29,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:08:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:08:29,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:08:29,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:08:29,411 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:08:29,412 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:08:29,483 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:08:29,486 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:08:29,486 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:08:29,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:29 BoogieIcfgContainer [2022-01-31 08:08:29,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:08:29,488 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:08:29,488 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:08:29,489 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:08:29,491 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:29" (1/1) ... [2022-01-31 08:08:29,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:08:29 BasicIcfg [2022-01-31 08:08:29,501 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:08:29,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:08:29,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:08:29,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:08:29,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:08:29" (1/4) ... [2022-01-31 08:08:29,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ea734c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:08:29, skipping insertion in model container [2022-01-31 08:08:29,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:29" (2/4) ... [2022-01-31 08:08:29,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ea734c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:08:29, skipping insertion in model container [2022-01-31 08:08:29,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:29" (3/4) ... [2022-01-31 08:08:29,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ea734c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:08:29, skipping insertion in model container [2022-01-31 08:08:29,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:08:29" (4/4) ... [2022-01-31 08:08:29,506 INFO L111 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.iJordan [2022-01-31 08:08:29,509 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:08:29,509 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:08:29,537 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:08:29,541 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:08:29,541 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:08:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:29,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:08:29,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:29,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:29,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:29,558 INFO L85 PathProgramCache]: Analyzing trace with hash 262659094, now seen corresponding path program 1 times [2022-01-31 08:08:29,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:29,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498714351] [2022-01-31 08:08:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:29,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:29,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:29,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:29,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498714351] [2022-01-31 08:08:29,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498714351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:08:29,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:08:29,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:08:29,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071401506] [2022-01-31 08:08:29,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:08:29,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:08:29,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:08:29,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:08:29,761 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:29,793 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 08:08:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:08:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:08:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:29,802 INFO L225 Difference]: With dead ends: 25 [2022-01-31 08:08:29,803 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 08:08:29,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:08:29,807 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:29,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:08:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 08:08:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 08:08:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:08:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 08:08:29,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-31 08:08:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:29,832 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 08:08:29,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 08:08:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:08:29,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:29,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:29,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:08:29,833 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1150162775, now seen corresponding path program 1 times [2022-01-31 08:08:29,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:29,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593912591] [2022-01-31 08:08:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:29,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:29,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593912591] [2022-01-31 08:08:29,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593912591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:08:29,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:08:29,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:08:29,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390466154] [2022-01-31 08:08:29,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:08:29,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:08:29,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:08:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:08:29,914 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:29,973 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-31 08:08:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:08:29,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:08:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:29,975 INFO L225 Difference]: With dead ends: 27 [2022-01-31 08:08:29,975 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:08:29,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:08:29,976 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:29,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:08:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:08:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-31 08:08:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 08:08:29,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2022-01-31 08:08:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:29,982 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 08:08:29,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 08:08:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:08:29,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:29,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:29,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:08:29,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash 228558549, now seen corresponding path program 1 times [2022-01-31 08:08:29,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:29,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054848938] [2022-01-31 08:08:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:29,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:30,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:30,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054848938] [2022-01-31 08:08:30,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054848938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:30,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081911550] [2022-01-31 08:08:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:30,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:30,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:30,064 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) [2022-01-31 08:08:30,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:08:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:08:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:30,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:30,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081911550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:30,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:30,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:08:30,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816472985] [2022-01-31 08:08:30,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:30,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:08:30,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:08:30,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:08:30,216 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:30,346 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-01-31 08:08:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:08:30,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 08:08:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:30,347 INFO L225 Difference]: With dead ends: 43 [2022-01-31 08:08:30,348 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 08:08:30,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:08:30,349 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:30,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 32 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 08:08:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-01-31 08:08:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:08:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 08:08:30,355 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 15 [2022-01-31 08:08:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:30,355 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 08:08:30,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 08:08:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 08:08:30,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:30,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:30,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:30,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:30,577 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1458050993, now seen corresponding path program 2 times [2022-01-31 08:08:30,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:30,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113007298] [2022-01-31 08:08:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:30,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:30,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:30,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:30,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113007298] [2022-01-31 08:08:30,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113007298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:30,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583456409] [2022-01-31 08:08:30,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:08:30,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:30,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:30,660 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) [2022-01-31 08:08:30,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:08:30,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:08:30,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:08:30,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:30,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:30,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583456409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:30,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:30,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:08:30,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138794441] [2022-01-31 08:08:30,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:30,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:08:30,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:08:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:08:30,853 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:31,075 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2022-01-31 08:08:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:08:31,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 08:08:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:31,077 INFO L225 Difference]: With dead ends: 85 [2022-01-31 08:08:31,077 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 08:08:31,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:08:31,078 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:31,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 27 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 08:08:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-01-31 08:08:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:08:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-01-31 08:08:31,086 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 21 [2022-01-31 08:08:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:31,087 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-01-31 08:08:31,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-01-31 08:08:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 08:08:31,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:31,088 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:31,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:31,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:08:31,296 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1273249597, now seen corresponding path program 3 times [2022-01-31 08:08:31,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197436653] [2022-01-31 08:08:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:31,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:31,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:31,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:31,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197436653] [2022-01-31 08:08:31,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197436653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945334546] [2022-01-31 08:08:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:08:31,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:31,463 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) [2022-01-31 08:08:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:08:31,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 08:08:31,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:31,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:08:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:31,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:31,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945334546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:31,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:31,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:08:31,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060766] [2022-01-31 08:08:31,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:31,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:08:31,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:31,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:08:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:08:31,802 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:32,358 INFO L93 Difference]: Finished difference Result 169 states and 202 transitions. [2022-01-31 08:08:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:08:32,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 08:08:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:32,360 INFO L225 Difference]: With dead ends: 169 [2022-01-31 08:08:32,360 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 08:08:32,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 08:08:32,361 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 279 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:32,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 47 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:08:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 08:08:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 117. [2022-01-31 08:08:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 08:08:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2022-01-31 08:08:32,376 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 33 [2022-01-31 08:08:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:32,376 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2022-01-31 08:08:32,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2022-01-31 08:08:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 08:08:32,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:32,378 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:32,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:32,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:32,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1940306005, now seen corresponding path program 4 times [2022-01-31 08:08:32,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:32,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975238371] [2022-01-31 08:08:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:32,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:33,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:33,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975238371] [2022-01-31 08:08:33,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975238371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154945032] [2022-01-31 08:08:33,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:08:33,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:33,030 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) [2022-01-31 08:08:33,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:08:33,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:08:33,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:33,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 08:08:33,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:33,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:33,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154945032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:33,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:33,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 08:08:33,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199014742] [2022-01-31 08:08:33,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:33,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 08:08:33,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 08:08:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 08:08:33,864 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:35,280 INFO L93 Difference]: Finished difference Result 337 states and 406 transitions. [2022-01-31 08:08:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 08:08:35,280 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 08:08:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:35,282 INFO L225 Difference]: With dead ends: 337 [2022-01-31 08:08:35,282 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 08:08:35,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 08:08:35,284 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 723 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:35,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 42 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:08:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 08:08:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 225. [2022-01-31 08:08:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 08:08:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 250 transitions. [2022-01-31 08:08:35,312 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 250 transitions. Word has length 57 [2022-01-31 08:08:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:35,313 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 250 transitions. [2022-01-31 08:08:35,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 250 transitions. [2022-01-31 08:08:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 08:08:35,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:35,315 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:35,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:35,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:35,525 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:35,525 INFO L85 PathProgramCache]: Analyzing trace with hash -147346053, now seen corresponding path program 5 times [2022-01-31 08:08:35,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:35,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430114406] [2022-01-31 08:08:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:35,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:36,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:36,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:36,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430114406] [2022-01-31 08:08:36,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430114406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:36,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941089575] [2022-01-31 08:08:36,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:08:36,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:36,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:36,398 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) [2022-01-31 08:08:36,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:09:04,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-31 08:09:04,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:09:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 08:09:04,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:09:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:09:04,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:09:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:09:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941089575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:09:06,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:09:06,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-01-31 08:09:06,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908273258] [2022-01-31 08:09:06,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:09:06,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 08:09:06,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:09:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 08:09:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 08:09:06,460 INFO L87 Difference]: Start difference. First operand 225 states and 250 transitions. Second operand has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:09:10,646 INFO L93 Difference]: Finished difference Result 673 states and 814 transitions. [2022-01-31 08:09:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 08:09:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 08:09:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:09:10,650 INFO L225 Difference]: With dead ends: 673 [2022-01-31 08:09:10,650 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 08:09:10,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-01-31 08:09:10,656 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1541 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:09:10,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 62 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 08:09:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 08:09:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 441. [2022-01-31 08:09:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 388 states have (on average 1.0077319587628866) internal successors, (391), 388 states have internal predecessors, (391), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 08:09:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 490 transitions. [2022-01-31 08:09:10,679 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 490 transitions. Word has length 105 [2022-01-31 08:09:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:09:10,679 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 490 transitions. [2022-01-31 08:09:10,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 490 transitions. [2022-01-31 08:09:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 08:09:10,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:09:10,682 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:09:10,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:09:10,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:09:10,896 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:09:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:09:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1726077211, now seen corresponding path program 6 times [2022-01-31 08:09:10,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:09:10,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153830532] [2022-01-31 08:09:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:09:10,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:09:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:13,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:09:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:09:13,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:09:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153830532] [2022-01-31 08:09:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153830532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:09:13,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182891708] [2022-01-31 08:09:13,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:09:13,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:09:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:09:13,938 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) [2022-01-31 08:09:13,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process