/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/reducercommutativity/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:38:10,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:38:10,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:38:10,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:38:10,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:38:10,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:38:10,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:38:10,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:38:10,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:38:10,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:38:10,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:38:10,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:38:10,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:38:10,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:38:10,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:38:10,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:38:10,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:38:10,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:38:10,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:38:10,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:38:10,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:38:10,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:38:10,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:38:10,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:38:10,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:38:10,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:38:10,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:38:10,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:38:10,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:38:10,378 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:38:10,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:38:10,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:38:10,380 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:38:10,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:38:10,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:38:10,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:38:10,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:38:10,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:38:10,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:38:10,381 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:38:10,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:38:10,381 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:38:10,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:38:10,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:38:10,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:38:10,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:38:10,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:38:10,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:38:10,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:38:10,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:38:10,386 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:38:10,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:38:10,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:38:10,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:38:10,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:38:10,581 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:38:10,582 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:38:10,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i [2022-01-31 08:38:10,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b4fbd09/47199e7056054de99806fb9c8870e3d8/FLAG5d9a5cce7 [2022-01-31 08:38:10,984 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:38:10,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i [2022-01-31 08:38:10,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b4fbd09/47199e7056054de99806fb9c8870e3d8/FLAG5d9a5cce7 [2022-01-31 08:38:11,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b4fbd09/47199e7056054de99806fb9c8870e3d8 [2022-01-31 08:38:11,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:38:11,417 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:38:11,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:38:11,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:38:11,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:38:11,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bba7858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11, skipping insertion in model container [2022-01-31 08:38:11,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:38:11,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:38:11,621 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i[1293,1306] [2022-01-31 08:38:11,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:38:11,628 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:38:11,640 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i[1293,1306] [2022-01-31 08:38:11,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:38:11,649 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:38:11,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11 WrapperNode [2022-01-31 08:38:11,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:38:11,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:38:11,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:38:11,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:38:11,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:38:11,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:38:11,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:38:11,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:38:11,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:38:11,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:11,694 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 08:38:11,697 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 08:38:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:38:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:38:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:38:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-01-31 08:38:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-01-31 08:38:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:38:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:38:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:38:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:38:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:38:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:38:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:38:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:38:11,779 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:38:11,780 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:38:11,875 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:38:11,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:38:11,880 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:38:11,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:38:11 BoogieIcfgContainer [2022-01-31 08:38:11,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:38:11,882 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:38:11,882 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:38:11,883 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:38:11,885 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:38:11" (1/1) ... [2022-01-31 08:38:11,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:38:11 BasicIcfg [2022-01-31 08:38:11,899 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:38:11,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:38:11,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:38:11,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:38:11,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:38:11" (1/4) ... [2022-01-31 08:38:11,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f299dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:38:11, skipping insertion in model container [2022-01-31 08:38:11,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:11" (2/4) ... [2022-01-31 08:38:11,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f299dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:38:11, skipping insertion in model container [2022-01-31 08:38:11,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:38:11" (3/4) ... [2022-01-31 08:38:11,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f299dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:38:11, skipping insertion in model container [2022-01-31 08:38:11,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:38:11" (4/4) ... [2022-01-31 08:38:11,904 INFO L111 eAbstractionObserver]: Analyzing ICFG sep40-1.iJordan [2022-01-31 08:38:11,907 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:38:11,907 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:38:11,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:38:11,938 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 08:38:11,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:38:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:38:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:38:11,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:11,952 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:11,952 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash 820388973, now seen corresponding path program 1 times [2022-01-31 08:38:11,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:11,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374241820] [2022-01-31 08:38:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:11,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:38:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:38:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:38:12,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:12,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374241820] [2022-01-31 08:38:12,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374241820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:38:12,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:38:12,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:38:12,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534618388] [2022-01-31 08:38:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:38:12,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:38:12,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:38:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:38:12,195 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:12,234 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-01-31 08:38:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:38:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:38:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:12,250 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:38:12,250 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:38:12,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 08:38:12,258 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:12,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:38:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 08:38:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 08:38:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 08:38:12,294 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2022-01-31 08:38:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:12,294 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 08:38:12,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 08:38:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:38:12,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:12,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:12,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:38:12,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash 676191406, now seen corresponding path program 1 times [2022-01-31 08:38:12,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:12,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129557714] [2022-01-31 08:38:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:12,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:38:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:38:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:38:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:38:12,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:12,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129557714] [2022-01-31 08:38:12,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129557714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:12,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94089774] [2022-01-31 08:38:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:12,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:12,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:12,439 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 08:38:12,440 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 08:38:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:38:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:38:12,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:38:12,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94089774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:38:12,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:38:12,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:38:12,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427502694] [2022-01-31 08:38:12,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:38:12,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:38:12,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:38:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:12,574 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:12,581 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-31 08:38:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:38:12,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:38:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:12,583 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:38:12,583 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:38:12,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:12,584 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:12,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:12,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:38:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:38:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 08:38:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-31 08:38:12,596 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2022-01-31 08:38:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:12,596 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-31 08:38:12,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-31 08:38:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:38:12,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:12,597 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:12,617 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 08:38:12,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:12,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:12,815 INFO L85 PathProgramCache]: Analyzing trace with hash -941288240, now seen corresponding path program 1 times [2022-01-31 08:38:12,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:12,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608813566] [2022-01-31 08:38:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:12,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:38:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:38:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:38:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:38:12,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608813566] [2022-01-31 08:38:12,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608813566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:12,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047046948] [2022-01-31 08:38:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:12,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:12,913 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 08:38:12,914 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 08:38:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:12,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:38:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:38:13,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:38:13,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047046948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:38:13,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:38:13,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:38:13,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085820965] [2022-01-31 08:38:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:38:13,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:38:13,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:38:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:13,026 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:13,033 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-01-31 08:38:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:38:13,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-31 08:38:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:13,034 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:38:13,034 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:38:13,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:13,035 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:13,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:38:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-31 08:38:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 08:38:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 08:38:13,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2022-01-31 08:38:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:13,053 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 08:38:13,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 08:38:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 08:38:13,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:13,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:13,089 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 08:38:13,271 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,SelfDestructingSolverStorable2 [2022-01-31 08:38:13,272 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:13,272 INFO L85 PathProgramCache]: Analyzing trace with hash -996630189, now seen corresponding path program 1 times [2022-01-31 08:38:13,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:13,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725453370] [2022-01-31 08:38:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:13,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:38:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:38:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:38:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 08:38:13,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725453370] [2022-01-31 08:38:13,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725453370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553738779] [2022-01-31 08:38:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:13,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:13,396 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 08:38:13,419 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 08:38:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:38:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:38:13,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:38:13,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553738779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:38:13,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:38:13,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:38:13,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199380105] [2022-01-31 08:38:13,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:38:13,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:38:13,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:38:13,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:13,562 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:13,569 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-01-31 08:38:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:38:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-01-31 08:38:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:13,570 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:38:13,570 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:38:13,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:38:13,571 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:13,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:38:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-31 08:38:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 08:38:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-31 08:38:13,575 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2022-01-31 08:38:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:13,576 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-31 08:38:13,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:38:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-31 08:38:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 08:38:13,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:13,577 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:13,594 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 08:38:13,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:13,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:13,782 INFO L85 PathProgramCache]: Analyzing trace with hash -673044969, now seen corresponding path program 1 times [2022-01-31 08:38:13,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:13,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578380043] [2022-01-31 08:38:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:13,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:38:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:38:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:38:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:13,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:13,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578380043] [2022-01-31 08:38:13,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578380043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207797198] [2022-01-31 08:38:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:13,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:13,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:13,864 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 08:38:13,898 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 08:38:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:38:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:14,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:14,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207797198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:14,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:14,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:38:14,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729697021] [2022-01-31 08:38:14,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:14,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:38:14,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:38:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:38:14,091 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:14,152 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-31 08:38:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:38:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-01-31 08:38:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:14,153 INFO L225 Difference]: With dead ends: 36 [2022-01-31 08:38:14,153 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 08:38:14,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 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 08:38:14,154 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:14,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 34 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 08:38:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 08:38:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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 08:38:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-31 08:38:14,157 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 45 [2022-01-31 08:38:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:14,158 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-31 08:38:14,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-31 08:38:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 08:38:14,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:14,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:14,177 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 08:38:14,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:14,375 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash -322190095, now seen corresponding path program 2 times [2022-01-31 08:38:14,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:14,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363363340] [2022-01-31 08:38:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:14,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:14,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:14,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:38:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:14,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:38:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:14,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 08:38:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:38:14,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363363340] [2022-01-31 08:38:14,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363363340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030411964] [2022-01-31 08:38:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:38:14,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:14,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:14,430 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 08:38:14,432 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 08:38:14,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:38:14,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:14,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:38:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:14,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:38:14,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030411964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:14,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:14,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 08:38:14,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873278285] [2022-01-31 08:38:14,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:14,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:38:14,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:38:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:38:14,690 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:38:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:14,854 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-01-31 08:38:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:38:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-01-31 08:38:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:14,856 INFO L225 Difference]: With dead ends: 53 [2022-01-31 08:38:14,856 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 08:38:14,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:38:14,857 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:14,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 37 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 08:38:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-01-31 08:38:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 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 08:38:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-01-31 08:38:14,860 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 51 [2022-01-31 08:38:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:14,861 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-01-31 08:38:14,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:38:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-01-31 08:38:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 08:38:14,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:14,862 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:14,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 08:38:15,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:15,098 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:15,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1650423198, now seen corresponding path program 3 times [2022-01-31 08:38:15,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:15,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065708561] [2022-01-31 08:38:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:15,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:38:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:38:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 08:38:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-31 08:38:15,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:15,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065708561] [2022-01-31 08:38:15,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065708561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:15,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641326214] [2022-01-31 08:38:15,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:38:15,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:15,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:15,193 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 08:38:15,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:38:15,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:38:15,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:38:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-31 08:38:15,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-31 08:38:15,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641326214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:15,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:15,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:38:15,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439476293] [2022-01-31 08:38:15,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:15,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:38:15,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:38:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:38:15,405 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:38:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:15,476 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-01-31 08:38:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:38:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2022-01-31 08:38:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:15,477 INFO L225 Difference]: With dead ends: 57 [2022-01-31 08:38:15,477 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 08:38:15,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 149 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 08:38:15,478 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:15,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:38:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 08:38:15,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 08:38:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 08:38:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-01-31 08:38:15,482 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 72 [2022-01-31 08:38:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:15,482 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-01-31 08:38:15,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:38:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-01-31 08:38:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 08:38:15,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:15,483 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:15,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:15,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:15,718 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash 831180370, now seen corresponding path program 4 times [2022-01-31 08:38:15,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:15,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817204541] [2022-01-31 08:38:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:15,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:38:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:38:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:38:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-31 08:38:15,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817204541] [2022-01-31 08:38:15,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817204541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14926357] [2022-01-31 08:38:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:38:15,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:15,856 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) [2022-01-31 08:38:15,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:38:15,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:38:15,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:15,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:38:15,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-31 08:38:16,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-31 08:38:16,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14926357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:16,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:16,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 08:38:16,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884449496] [2022-01-31 08:38:16,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:16,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 08:38:16,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 08:38:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:38:16,137 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:16,440 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2022-01-31 08:38:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:38:16,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 78 [2022-01-31 08:38:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:16,441 INFO L225 Difference]: With dead ends: 72 [2022-01-31 08:38:16,441 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 08:38:16,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:38:16,442 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:16,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 67 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 08:38:16,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 08:38:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 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 08:38:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-01-31 08:38:16,446 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 78 [2022-01-31 08:38:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:16,446 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-01-31 08:38:16,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-01-31 08:38:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 08:38:16,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:16,448 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:16,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:16,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:16,665 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:16,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:16,665 INFO L85 PathProgramCache]: Analyzing trace with hash -223833676, now seen corresponding path program 5 times [2022-01-31 08:38:16,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:16,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127283398] [2022-01-31 08:38:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:16,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:16,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:16,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:38:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:16,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 08:38:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:16,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 08:38:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-01-31 08:38:16,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:16,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127283398] [2022-01-31 08:38:16,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127283398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:16,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017872078] [2022-01-31 08:38:16,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:38:16,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:16,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:16,874 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) [2022-01-31 08:38:16,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:38:17,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-31 08:38:17,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:38:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-01-31 08:38:17,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-01-31 08:38:17,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017872078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:17,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:17,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-31 08:38:17,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623920118] [2022-01-31 08:38:17,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:17,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 08:38:17,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 08:38:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-31 08:38:17,708 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:18,120 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2022-01-31 08:38:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:38:18,120 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-01-31 08:38:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:18,121 INFO L225 Difference]: With dead ends: 98 [2022-01-31 08:38:18,121 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 08:38:18,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 08:38:18,123 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 167 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:18,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 52 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 08:38:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 08:38:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 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 08:38:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2022-01-31 08:38:18,128 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 116 [2022-01-31 08:38:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:18,128 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2022-01-31 08:38:18,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2022-01-31 08:38:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 08:38:18,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:18,130 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:18,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:18,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 08:38:18,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:18,331 INFO L85 PathProgramCache]: Analyzing trace with hash 502059094, now seen corresponding path program 6 times [2022-01-31 08:38:18,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:18,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610662553] [2022-01-31 08:38:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:18,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:38:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:38:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 08:38:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2022-01-31 08:38:18,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:18,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610662553] [2022-01-31 08:38:18,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610662553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:18,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551279827] [2022-01-31 08:38:18,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:38:18,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:18,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:18,550 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) [2022-01-31 08:38:18,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:38:18,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 08:38:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:38:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 1242 proven. 16 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-01-31 08:38:18,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2022-01-31 08:38:19,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551279827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:19,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:19,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-31 08:38:19,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67994885] [2022-01-31 08:38:19,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:19,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:38:19,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:19,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:38:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:38:19,163 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:19,505 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-01-31 08:38:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:38:19,505 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 190 [2022-01-31 08:38:19,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:19,506 INFO L225 Difference]: With dead ends: 112 [2022-01-31 08:38:19,506 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 08:38:19,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 08:38:19,507 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:19,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 08:38:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-01-31 08:38:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 states have internal predecessors, (120), 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 08:38:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2022-01-31 08:38:19,512 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 190 [2022-01-31 08:38:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:19,512 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2022-01-31 08:38:19,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2022-01-31 08:38:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 08:38:19,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:19,514 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:19,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:19,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:38:19,734 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1107414944, now seen corresponding path program 7 times [2022-01-31 08:38:19,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:19,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133903254] [2022-01-31 08:38:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:19,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:19,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:19,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:38:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:19,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 08:38:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:19,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-31 08:38:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:19,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:19,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133903254] [2022-01-31 08:38:19,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133903254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:19,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319512659] [2022-01-31 08:38:19,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:38:19,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:19,946 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:19,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:38:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:20,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:38:20,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:20,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:20,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319512659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:20,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:20,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-31 08:38:20,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383286453] [2022-01-31 08:38:20,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:20,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 08:38:20,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 08:38:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 08:38:20,752 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:21,245 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2022-01-31 08:38:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 08:38:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 204 [2022-01-31 08:38:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:21,248 INFO L225 Difference]: With dead ends: 141 [2022-01-31 08:38:21,248 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 08:38:21,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 08:38:21,250 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:21,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 54 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 08:38:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-01-31 08:38:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 133 states have internal predecessors, (150), 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 08:38:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2022-01-31 08:38:21,256 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 204 [2022-01-31 08:38:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:21,256 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2022-01-31 08:38:21,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2022-01-31 08:38:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 08:38:21,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:21,258 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 28, 28, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:21,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:21,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 08:38:21,484 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1855062238, now seen corresponding path program 8 times [2022-01-31 08:38:21,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:21,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113843841] [2022-01-31 08:38:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:21,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:21,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:21,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:38:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:21,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 08:38:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:21,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-31 08:38:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:21,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:21,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113843841] [2022-01-31 08:38:21,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113843841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:21,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109952803] [2022-01-31 08:38:21,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:38:21,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:21,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:21,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:21,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:38:22,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:38:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:22,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 08:38:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:22,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:38:22,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109952803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:22,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:22,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 44 [2022-01-31 08:38:22,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756593568] [2022-01-31 08:38:22,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:22,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 08:38:22,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 08:38:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 08:38:22,922 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 43 states have internal predecessors, (111), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:23,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:23,694 INFO L93 Difference]: Finished difference Result 165 states and 183 transitions. [2022-01-31 08:38:23,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 08:38:23,695 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 43 states have internal predecessors, (111), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 234 [2022-01-31 08:38:23,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:23,695 INFO L225 Difference]: With dead ends: 165 [2022-01-31 08:38:23,696 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 08:38:23,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 463 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2626, Invalid=4346, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 08:38:23,698 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:23,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 64 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:23,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 08:38:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-01-31 08:38:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 157 states have (on average 1.10828025477707) internal successors, (174), 157 states have internal predecessors, (174), 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 08:38:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 183 transitions. [2022-01-31 08:38:23,702 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 183 transitions. Word has length 234 [2022-01-31 08:38:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:23,702 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 183 transitions. [2022-01-31 08:38:23,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.522727272727273) internal successors, (111), 43 states have internal predecessors, (111), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 183 transitions. [2022-01-31 08:38:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 08:38:23,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:23,704 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 40, 40, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:23,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:23,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:38:23,924 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2067733642, now seen corresponding path program 9 times [2022-01-31 08:38:23,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:23,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408370652] [2022-01-31 08:38:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:23,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:24,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:24,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:38:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:24,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 08:38:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:24,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-31 08:38:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4424 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 2897 trivial. 0 not checked. [2022-01-31 08:38:24,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:24,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408370652] [2022-01-31 08:38:24,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408370652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:24,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192618948] [2022-01-31 08:38:24,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:38:24,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:24,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:24,195 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:24,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 08:38:25,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 08:38:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:25,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:38:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4424 backedges. 1242 proven. 100 refuted. 0 times theorem prover too weak. 3082 trivial. 0 not checked. [2022-01-31 08:38:25,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4424 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-01-31 08:38:26,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192618948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:26,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:26,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 40 [2022-01-31 08:38:26,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088702706] [2022-01-31 08:38:26,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:26,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 08:38:26,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:26,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 08:38:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 08:38:26,104 INFO L87 Difference]: Start difference. First operand 165 states and 183 transitions. Second operand has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:26,685 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2022-01-31 08:38:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 08:38:26,687 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 258 [2022-01-31 08:38:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:26,688 INFO L225 Difference]: With dead ends: 194 [2022-01-31 08:38:26,688 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 08:38:26,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1233, Invalid=4619, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 08:38:26,690 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 204 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:26,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 52 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:38:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 08:38:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2022-01-31 08:38:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 184 states have (on average 1.0978260869565217) internal successors, (202), 184 states have internal predecessors, (202), 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 08:38:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 211 transitions. [2022-01-31 08:38:26,694 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 211 transitions. Word has length 258 [2022-01-31 08:38:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:26,695 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 211 transitions. [2022-01-31 08:38:26,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 states have internal predecessors, (119), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 211 transitions. [2022-01-31 08:38:26,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 08:38:26,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:26,702 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:26,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 08:38:26,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:38:26,903 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1592328349, now seen corresponding path program 10 times [2022-01-31 08:38:26,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:26,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587165449] [2022-01-31 08:38:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:26,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:26,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:27,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:38:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:27,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 08:38:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:27,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2022-01-31 08:38:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5204 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 3456 trivial. 0 not checked. [2022-01-31 08:38:27,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587165449] [2022-01-31 08:38:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587165449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193864839] [2022-01-31 08:38:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:38:27,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:27,196 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:27,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 08:38:27,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:38:27,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:38:27,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 08:38:27,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:38:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5204 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 3456 trivial. 0 not checked. [2022-01-31 08:38:27,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:38:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5204 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 3456 trivial. 0 not checked. [2022-01-31 08:38:28,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193864839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:38:28,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:38:28,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 35 [2022-01-31 08:38:28,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149326073] [2022-01-31 08:38:28,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:38:28,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:38:28,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:38:28,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:38:28,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:38:28,134 INFO L87 Difference]: Start difference. First operand 192 states and 211 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:38:28,727 INFO L93 Difference]: Finished difference Result 243 states and 279 transitions. [2022-01-31 08:38:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 08:38:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 291 [2022-01-31 08:38:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:38:28,729 INFO L225 Difference]: With dead ends: 243 [2022-01-31 08:38:28,729 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 08:38:28,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 08:38:28,730 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:38:28,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 59 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:38:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 08:38:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-01-31 08:38:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 235 states have (on average 1.148936170212766) internal successors, (270), 235 states have internal predecessors, (270), 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 08:38:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 279 transitions. [2022-01-31 08:38:28,738 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 279 transitions. Word has length 291 [2022-01-31 08:38:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:38:28,739 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 279 transitions. [2022-01-31 08:38:28,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:38:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 279 transitions. [2022-01-31 08:38:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-01-31 08:38:28,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:38:28,741 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:38:28,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 08:38:28,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 08:38:28,959 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:38:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:38:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash 785804838, now seen corresponding path program 11 times [2022-01-31 08:38:28,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:38:28,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620800164] [2022-01-31 08:38:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:38:28,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:38:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:29,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:38:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:29,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:38:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:29,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 08:38:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:29,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 339 [2022-01-31 08:38:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:38:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16067 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 8267 trivial. 0 not checked. [2022-01-31 08:38:29,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:38:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620800164] [2022-01-31 08:38:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620800164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:38:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256174912] [2022-01-31 08:38:29,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:38:29,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:38:29,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:38:29,641 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:38:29,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process