/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 16:13:41,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 16:13:41,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 16:13:41,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 16:13:41,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 16:13:41,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 16:13:41,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 16:13:41,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 16:13:41,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 16:13:41,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 16:13:41,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 16:13:41,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 16:13:41,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 16:13:41,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 16:13:41,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 16:13:41,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 16:13:41,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 16:13:41,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 16:13:41,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 16:13:41,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 16:13:41,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 16:13:41,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 16:13:41,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 16:13:41,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 16:13:41,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 16:13:41,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 16:13:41,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 16:13:41,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 16:13:41,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 16:13:41,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 16:13:41,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 16:13:41,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 16:13:41,702 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 16:13:41,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 16:13:41,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 16:13:41,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 16:13:41,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 16:13:41,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 16:13:41,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 16:13:41,703 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 16:13:41,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 16:13:41,703 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 16:13:41,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 16:13:41,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 16:13:41,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 16:13:41,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 16:13:41,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 16:13:41,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 16:13:41,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 16:13:41,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 16:13:41,705 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 16:13:41,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 16:13:41,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 16:13:41,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 16:13:41,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 16:13:41,948 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 16:13:41,949 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 16:13:41,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2022-01-31 16:13:42,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dff22a91/5568149e35094200a96bf37363fd479e/FLAG8115e29ae [2022-01-31 16:13:42,387 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 16:13:42,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2022-01-31 16:13:42,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dff22a91/5568149e35094200a96bf37363fd479e/FLAG8115e29ae [2022-01-31 16:13:42,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dff22a91/5568149e35094200a96bf37363fd479e [2022-01-31 16:13:42,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 16:13:42,802 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 16:13:42,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 16:13:42,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 16:13:42,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 16:13:42,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:13:42" (1/1) ... [2022-01-31 16:13:42,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ef4aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:42, skipping insertion in model container [2022-01-31 16:13:42,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:13:42" (1/1) ... [2022-01-31 16:13:42,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 16:13:42,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 16:13:42,931 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2022-01-31 16:13:42,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 16:13:42,972 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 16:13:42,986 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2022-01-31 16:13:43,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 16:13:43,013 INFO L208 MainTranslator]: Completed translation [2022-01-31 16:13:43,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43 WrapperNode [2022-01-31 16:13:43,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 16:13:43,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 16:13:43,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 16:13:43,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 16:13:43,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 16:13:43,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 16:13:43,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 16:13:43,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 16:13:43,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 16:13:43,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:13:43,084 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 16:13:43,090 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 16:13:43,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 16:13:43,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 16:13:43,117 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 16:13:43,117 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 16:13:43,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 16:13:43,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 16:13:43,117 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 16:13:43,117 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 16:13:43,117 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 16:13:43,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 16:13:43,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 16:13:43,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 16:13:43,168 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 16:13:43,169 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 16:13:43,317 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 16:13:43,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 16:13:43,322 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 16:13:43,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:13:43 BoogieIcfgContainer [2022-01-31 16:13:43,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 16:13:43,324 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 16:13:43,324 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 16:13:43,331 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 16:13:43,349 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:13:43" (1/1) ... [2022-01-31 16:13:43,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 04:13:43 BasicIcfg [2022-01-31 16:13:43,362 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 16:13:43,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 16:13:43,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 16:13:43,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 16:13:43,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:13:42" (1/4) ... [2022-01-31 16:13:43,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af1b1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:13:43, skipping insertion in model container [2022-01-31 16:13:43,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:43" (2/4) ... [2022-01-31 16:13:43,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af1b1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:13:43, skipping insertion in model container [2022-01-31 16:13:43,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:13:43" (3/4) ... [2022-01-31 16:13:43,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af1b1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:13:43, skipping insertion in model container [2022-01-31 16:13:43,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 04:13:43" (4/4) ... [2022-01-31 16:13:43,384 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.cJordan [2022-01-31 16:13:43,389 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 16:13:43,389 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 16:13:43,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 16:13:43,457 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 16:13:43,457 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 16:13:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 16:13:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 16:13:43,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:13:43,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:43,488 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:13:43,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:13:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2022-01-31 16:13:43,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:13:43,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811216259] [2022-01-31 16:13:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:43,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:13:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:13:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:13:43,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:13:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811216259] [2022-01-31 16:13:43,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811216259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 16:13:43,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 16:13:43,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 16:13:43,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126569822] [2022-01-31 16:13:43,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 16:13:43,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 16:13:43,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:13:43,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 16:13:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 16:13:43,724 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 16:13:43,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:13:43,797 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-01-31 16:13:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 16:13:43,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 16:13:43,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:13:43,806 INFO L225 Difference]: With dead ends: 27 [2022-01-31 16:13:43,806 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 16:13:43,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 16:13:43,811 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 16:13:43,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 16:13:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 16:13:43,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-31 16:13:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 16:13:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-01-31 16:13:43,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-01-31 16:13:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:13:43,837 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-01-31 16:13:43,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 16:13:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-01-31 16:13:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 16:13:43,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:13:43,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:43,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 16:13:43,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:13:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:13:43,839 INFO L85 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2022-01-31 16:13:43,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:13:43,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982300587] [2022-01-31 16:13:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:43,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:13:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:43,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:13:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:13:43,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:13:43,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982300587] [2022-01-31 16:13:43,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982300587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 16:13:43,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 16:13:43,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 16:13:43,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354954347] [2022-01-31 16:13:43,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 16:13:43,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 16:13:43,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:13:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 16:13:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 16:13:43,925 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 16:13:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:13:44,001 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-01-31 16:13:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 16:13:44,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 16:13:44,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:13:44,004 INFO L225 Difference]: With dead ends: 23 [2022-01-31 16:13:44,004 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 16:13:44,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 16:13:44,009 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 16:13:44,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 16:13:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 16:13:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 16:13:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 16:13:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-31 16:13:44,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-01-31 16:13:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:13:44,017 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-31 16:13:44,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 16:13:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-31 16:13:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 16:13:44,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:13:44,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:44,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 16:13:44,025 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:13:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:13:44,026 INFO L85 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2022-01-31 16:13:44,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:13:44,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440998708] [2022-01-31 16:13:44,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:44,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:13:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:44,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 16:13:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:13:44,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:13:44,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440998708] [2022-01-31 16:13:44,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440998708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 16:13:44,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 16:13:44,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 16:13:44,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698661151] [2022-01-31 16:13:44,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 16:13:44,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 16:13:44,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:13:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 16:13:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 16:13:44,115 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 16:13:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:13:44,270 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-01-31 16:13:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 16:13:44,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 16:13:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:13:44,272 INFO L225 Difference]: With dead ends: 34 [2022-01-31 16:13:44,272 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 16:13:44,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 16:13:44,273 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 16:13:44,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 16:13:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 16:13:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-01-31 16:13:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 16:13:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-01-31 16:13:44,283 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-01-31 16:13:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:13:44,283 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-01-31 16:13:44,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 16:13:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-01-31 16:13:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 16:13:44,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:13:44,284 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:44,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 16:13:44,284 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:13:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:13:44,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2022-01-31 16:13:44,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:13:44,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722140315] [2022-01-31 16:13:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:44,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:13:44,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 16:13:44,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206235639] [2022-01-31 16:13:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:44,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:13:44,299 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 16:13:44,308 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 16:13:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:44,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 16:13:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:13:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 16:13:44,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 16:13:44,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:13:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722140315] [2022-01-31 16:13:44,481 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 16:13:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206235639] [2022-01-31 16:13:44,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206235639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 16:13:44,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 16:13:44,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 16:13:44,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797934433] [2022-01-31 16:13:44,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 16:13:44,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 16:13:44,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:13:44,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 16:13:44,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 16:13:44,483 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 16:13:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:13:44,523 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-01-31 16:13:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 16:13:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-01-31 16:13:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:13:44,526 INFO L225 Difference]: With dead ends: 38 [2022-01-31 16:13:44,526 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 16:13:44,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 16:13:44,528 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 16:13:44,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 16:13:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 16:13:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 16:13:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 16:13:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-01-31 16:13:44,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-01-31 16:13:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:13:44,536 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-01-31 16:13:44,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 16:13:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-01-31 16:13:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 16:13:44,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:13:44,537 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:44,559 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 16:13:44,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:44,747 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:13:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:13:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times [2022-01-31 16:13:44,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:13:44,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954606630] [2022-01-31 16:13:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:44,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:13:44,759 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 16:13:44,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443089344] [2022-01-31 16:13:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:44,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:13:44,760 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 16:13:44,786 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 16:13:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 16:13:44,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:13:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 16:13:44,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 16:13:44,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:13:44,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954606630] [2022-01-31 16:13:44,886 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 16:13:44,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443089344] [2022-01-31 16:13:44,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443089344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 16:13:44,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 16:13:44,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 16:13:44,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235411292] [2022-01-31 16:13:44,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 16:13:44,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 16:13:44,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:13:44,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 16:13:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 16:13:44,888 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 16:13:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:13:44,915 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-01-31 16:13:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 16:13:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 16:13:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:13:44,916 INFO L225 Difference]: With dead ends: 42 [2022-01-31 16:13:44,916 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 16:13:44,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 16:13:44,917 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 16:13:44,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 16:13:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 16:13:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-31 16:13:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 16:13:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-01-31 16:13:44,923 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-01-31 16:13:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:13:44,923 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-01-31 16:13:44,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 16:13:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-01-31 16:13:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 16:13:44,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:13:44,924 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:44,949 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 16:13:45,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:45,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:13:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:13:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2022-01-31 16:13:45,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:13:45,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852724816] [2022-01-31 16:13:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:45,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:13:45,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 16:13:45,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946741941] [2022-01-31 16:13:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:45,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:45,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:13:45,150 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 16:13:45,151 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 16:13:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 16:13:45,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:13:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 16:13:45,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:13:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 16:13:45,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:13:45,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852724816] [2022-01-31 16:13:45,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 16:13:45,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946741941] [2022-01-31 16:13:45,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946741941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:13:45,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 16:13:45,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 16:13:45,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225335383] [2022-01-31 16:13:45,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 16:13:45,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 16:13:45,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:13:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 16:13:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 16:13:45,384 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 16:13:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:13:45,501 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2022-01-31 16:13:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 16:13:45,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2022-01-31 16:13:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:13:45,503 INFO L225 Difference]: With dead ends: 71 [2022-01-31 16:13:45,503 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 16:13:45,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 16:13:45,505 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 16:13:45,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 116 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 16:13:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 16:13:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-01-31 16:13:45,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 16:13:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-01-31 16:13:45,529 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 30 [2022-01-31 16:13:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:13:45,529 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-01-31 16:13:45,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 16:13:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-01-31 16:13:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 16:13:45,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:13:45,530 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:45,556 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 16:13:45,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:45,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:13:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:13:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2022-01-31 16:13:45,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:13:45,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095285644] [2022-01-31 16:13:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:45,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:13:45,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 16:13:45,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758443959] [2022-01-31 16:13:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:45,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:13:45,761 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 16:13:45,762 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 16:13:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 16:13:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 16:13:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:13:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 16:13:45,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:13:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 16:13:46,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:13:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095285644] [2022-01-31 16:13:46,026 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 16:13:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758443959] [2022-01-31 16:13:46,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758443959] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 16:13:46,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 16:13:46,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-01-31 16:13:46,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936505614] [2022-01-31 16:13:46,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 16:13:46,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 16:13:46,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:13:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 16:13:46,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 16:13:46,028 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 16:13:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:13:46,076 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-01-31 16:13:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 16:13:46,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-01-31 16:13:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:13:46,079 INFO L225 Difference]: With dead ends: 79 [2022-01-31 16:13:46,079 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 16:13:46,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 16:13:46,081 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 16:13:46,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 16:13:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 16:13:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-01-31 16:13:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 16:13:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-01-31 16:13:46,094 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 30 [2022-01-31 16:13:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:13:46,094 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-01-31 16:13:46,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 16:13:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-01-31 16:13:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 16:13:46,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 16:13:46,095 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:46,113 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 16:13:46,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:46,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 16:13:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 16:13:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2022-01-31 16:13:46,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 16:13:46,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130184166] [2022-01-31 16:13:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 16:13:46,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 16:13:46,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 16:13:46,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792774635] [2022-01-31 16:13:46,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 16:13:46,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:46,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 16:13:46,322 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 16:13:46,327 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 16:13:46,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 16:13:46,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 16:13:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 16:13:46,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 16:13:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 16:13:46,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 16:13:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 16:13:46,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 16:13:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130184166] [2022-01-31 16:13:46,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 16:13:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792774635] [2022-01-31 16:13:46,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792774635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 16:13:46,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 16:13:46,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 16:13:46,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334673772] [2022-01-31 16:13:46,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 16:13:46,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 16:13:46,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 16:13:46,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 16:13:46,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 16:13:46,589 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 16:13:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 16:13:46,704 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-01-31 16:13:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 16:13:46,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2022-01-31 16:13:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 16:13:46,705 INFO L225 Difference]: With dead ends: 77 [2022-01-31 16:13:46,705 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 16:13:46,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 16:13:46,706 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 16:13:46,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 16:13:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 16:13:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 16:13:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 16:13:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 16:13:46,707 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-01-31 16:13:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 16:13:46,708 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 16:13:46,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 16:13:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 16:13:46,708 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 16:13:46,710 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 16:13:46,729 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 16:13:46,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 16:13:46,922 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-01-31 16:13:46,923 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 16:13:46,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:13:46 BasicIcfg [2022-01-31 16:13:46,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 16:13:46,925 INFO L158 Benchmark]: Toolchain (without parser) took 4123.35ms. Allocated memory was 210.8MB in the beginning and 265.3MB in the end (delta: 54.5MB). Free memory was 162.1MB in the beginning and 188.1MB in the end (delta: -26.0MB). Peak memory consumption was 29.8MB. Max. memory is 8.0GB. [2022-01-31 16:13:46,926 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 210.8MB. Free memory is still 178.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 16:13:46,926 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.08ms. Allocated memory is still 210.8MB. Free memory was 162.0MB in the beginning and 188.4MB in the end (delta: -26.4MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-01-31 16:13:46,926 INFO L158 Benchmark]: Boogie Preprocessor took 39.78ms. Allocated memory is still 210.8MB. Free memory was 188.4MB in the beginning and 186.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 16:13:46,926 INFO L158 Benchmark]: RCFGBuilder took 268.28ms. Allocated memory is still 210.8MB. Free memory was 186.3MB in the beginning and 176.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 16:13:46,926 INFO L158 Benchmark]: IcfgTransformer took 38.01ms. Allocated memory is still 210.8MB. Free memory was 176.3MB in the beginning and 174.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 16:13:46,927 INFO L158 Benchmark]: TraceAbstraction took 3545.68ms. Allocated memory was 210.8MB in the beginning and 265.3MB in the end (delta: 54.5MB). Free memory was 174.7MB in the beginning and 188.1MB in the end (delta: -13.4MB). Peak memory consumption was 42.7MB. Max. memory is 8.0GB. [2022-01-31 16:13:46,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 210.8MB. Free memory is still 178.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 211.08ms. Allocated memory is still 210.8MB. Free memory was 162.0MB in the beginning and 188.4MB in the end (delta: -26.4MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.78ms. Allocated memory is still 210.8MB. Free memory was 188.4MB in the beginning and 186.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 268.28ms. Allocated memory is still 210.8MB. Free memory was 186.3MB in the beginning and 176.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 38.01ms. Allocated memory is still 210.8MB. Free memory was 176.3MB in the beginning and 174.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3545.68ms. Allocated memory was 210.8MB in the beginning and 265.3MB in the end (delta: 54.5MB). Free memory was 174.7MB in the beginning and 188.1MB in the end (delta: -13.4MB). Peak memory consumption was 42.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.5s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 108 mSDsluCounter, 651 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 427 mSDsCounter, 93 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 343 IncrementalHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 93 mSolverCounterUnsat, 224 mSDtfsCounter, 343 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=7, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 253 ConstructedInterpolants, 0 QuantifiedInterpolants, 822 SizeOfPredicates, 7 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 149/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 16:13:46,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...