/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_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 18:41:47,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 18:41:47,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 18:41:47,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 18:41:47,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 18:41:47,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 18:41:47,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 18:41:47,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 18:41:47,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 18:41:47,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 18:41:47,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 18:41:47,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 18:41:47,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 18:41:47,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 18:41:47,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 18:41:47,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 18:41:47,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 18:41:47,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 18:41:47,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 18:41:47,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 18:41:47,979 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 18:41:47,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 18:41:47,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 18:41:47,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 18:41:47,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 18:41:47,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 18:41:47,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 18:41:47,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 18:41:47,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 18:41:48,000 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 18:41:48,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 18:41:48,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 18:41:48,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 18:41:48,011 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 18:41:48,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 18:41:48,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 18:41:48,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 18:41:48,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 18:41:48,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 18:41:48,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 18:41:48,012 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 18:41:48,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 18:41:48,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 18:41:48,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 18:41:48,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 18:41:48,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 18:41:48,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 18:41:48,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 18:41:48,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:41:48,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 18:41:48,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 18:41:48,013 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 18:41:48,013 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 18:41:48,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 18:41:48,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 18:41:48,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 18:41:48,174 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 18:41:48,174 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 18:41:48,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2022-03-17 18:41:48,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c223af3/b73d45a69fe94d159ea986eb05455f3d/FLAG6644368ee [2022-03-17 18:41:48,574 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 18:41:48,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2022-03-17 18:41:48,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c223af3/b73d45a69fe94d159ea986eb05455f3d/FLAG6644368ee [2022-03-17 18:41:48,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c223af3/b73d45a69fe94d159ea986eb05455f3d [2022-03-17 18:41:48,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 18:41:48,589 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 18:41:48,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 18:41:48,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 18:41:48,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 18:41:48,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6119dd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48, skipping insertion in model container [2022-03-17 18:41:48,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 18:41:48,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 18:41:48,710 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_unwindbound10.c[520,533] [2022-03-17 18:41:48,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:41:48,726 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 18:41:48,733 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_unwindbound10.c[520,533] [2022-03-17 18:41:48,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:41:48,745 INFO L208 MainTranslator]: Completed translation [2022-03-17 18:41:48,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48 WrapperNode [2022-03-17 18:41:48,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 18:41:48,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 18:41:48,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 18:41:48,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 18:41:48,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 18:41:48,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 18:41:48,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 18:41:48,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 18:41:48,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (1/1) ... [2022-03-17 18:41:48,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:41:48,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:41:48,787 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) [2022-03-17 18:41:48,792 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 [2022-03-17 18:41:48,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 18:41:48,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 18:41:48,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 18:41:48,810 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 18:41:48,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 18:41:48,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 18:41:48,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 18:41:48,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 18:41:48,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 18:41:48,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 18:41:48,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 18:41:48,855 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 18:41:48,856 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 18:41:48,993 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 18:41:48,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 18:41:48,999 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 18:41:49,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:41:49 BoogieIcfgContainer [2022-03-17 18:41:49,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 18:41:49,001 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 18:41:49,001 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 18:41:49,002 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 18:41:49,004 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:41:49" (1/1) ... [2022-03-17 18:41:49,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:41:49 BasicIcfg [2022-03-17 18:41:49,015 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 18:41:49,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 18:41:49,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 18:41:49,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 18:41:49,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:41:48" (1/4) ... [2022-03-17 18:41:49,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592cf09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:41:49, skipping insertion in model container [2022-03-17 18:41:49,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:41:48" (2/4) ... [2022-03-17 18:41:49,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592cf09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:41:49, skipping insertion in model container [2022-03-17 18:41:49,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:41:49" (3/4) ... [2022-03-17 18:41:49,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592cf09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:41:49, skipping insertion in model container [2022-03-17 18:41:49,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:41:49" (4/4) ... [2022-03-17 18:41:49,020 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.cJordan [2022-03-17 18:41:49,023 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 18:41:49,023 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 18:41:49,049 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 18:41:49,053 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 18:41:49,054 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 18:41:49,061 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) [2022-03-17 18:41:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 18:41:49,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:41:49,066 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:41:49,067 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:41:49,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:41:49,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2022-03-17 18:41:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:41:49,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75240909] [2022-03-17 18:41:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:41:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:49,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:41:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:41:49,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:41:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75240909] [2022-03-17 18:41:49,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75240909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:41:49,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:41:49,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 18:41:49,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154411757] [2022-03-17 18:41:49,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:41:49,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 18:41:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:41:49,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 18:41:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:41:49,205 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) [2022-03-17 18:41:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:41:49,264 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-03-17 18:41:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 18:41:49,266 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 [2022-03-17 18:41:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:41:49,270 INFO L225 Difference]: With dead ends: 27 [2022-03-17 18:41:49,271 INFO L226 Difference]: Without dead ends: 22 [2022-03-17 18:41:49,272 INFO L911 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 [2022-03-17 18:41:49,274 INFO L912 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:41:49,275 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:41:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-17 18:41:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-17 18:41:49,295 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) [2022-03-17 18:41:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-03-17 18:41:49,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-03-17 18:41:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:41:49,297 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-03-17 18:41:49,297 INFO L479 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) [2022-03-17 18:41:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-03-17 18:41:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 18:41:49,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:41:49,297 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:41:49,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 18:41:49,298 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:41:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:41:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2022-03-17 18:41:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:41:49,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580634148] [2022-03-17 18:41:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:49,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:41:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:49,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:41:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:41:49,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:41:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580634148] [2022-03-17 18:41:49,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580634148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:41:49,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:41:49,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 18:41:49,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045924013] [2022-03-17 18:41:49,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:41:49,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:41:49,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:41:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:41:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:41:49,359 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) [2022-03-17 18:41:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:41:49,409 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-03-17 18:41:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 18:41:49,409 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 [2022-03-17 18:41:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:41:49,410 INFO L225 Difference]: With dead ends: 23 [2022-03-17 18:41:49,410 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 18:41:49,410 INFO L911 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 [2022-03-17 18:41:49,411 INFO L912 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:41:49,412 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:41:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 18:41:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-17 18:41:49,415 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) [2022-03-17 18:41:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-03-17 18:41:49,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-03-17 18:41:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:41:49,416 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-03-17 18:41:49,416 INFO L479 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) [2022-03-17 18:41:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-03-17 18:41:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 18:41:49,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:41:49,417 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:41:49,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 18:41:49,417 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:41:49,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:41:49,418 INFO L85 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2022-03-17 18:41:49,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:41:49,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229765434] [2022-03-17 18:41:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:49,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:41:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:49,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:41:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:41:49,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:41:49,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229765434] [2022-03-17 18:41:49,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229765434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:41:49,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:41:49,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 18:41:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462571040] [2022-03-17 18:41:49,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:41:49,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 18:41:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:41:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 18:41:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 18:41:49,491 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) [2022-03-17 18:41:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:41:49,615 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-03-17 18:41:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 18:41:49,616 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 [2022-03-17 18:41:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:41:49,618 INFO L225 Difference]: With dead ends: 34 [2022-03-17 18:41:49,618 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 18:41:49,619 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 18:41:49,624 INFO L912 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 [2022-03-17 18:41:49,626 INFO L913 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] [2022-03-17 18:41:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 18:41:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-17 18:41:49,634 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) [2022-03-17 18:41:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-17 18:41:49,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-17 18:41:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:41:49,635 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-17 18:41:49,635 INFO L479 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) [2022-03-17 18:41:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-17 18:41:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 18:41:49,636 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:41:49,636 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:41:49,636 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 18:41:49,636 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:41:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:41:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2022-03-17 18:41:49,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:41:49,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802098433] [2022-03-17 18:41:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:49,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:41:49,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:41:49,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027315197] [2022-03-17 18:41:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:49,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:41:49,655 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) [2022-03-17 18:41:49,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 18:41:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 18:41:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:41:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 18:41:49,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:41:49,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:41:49,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802098433] [2022-03-17 18:41:49,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:41:49,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027315197] [2022-03-17 18:41:49,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027315197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:41:49,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:41:49,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 18:41:49,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298259921] [2022-03-17 18:41:49,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:41:49,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:41:49,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:41:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:41:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:41:49,821 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) [2022-03-17 18:41:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:41:49,853 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-17 18:41:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:41:49,854 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 [2022-03-17 18:41:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:41:49,855 INFO L225 Difference]: With dead ends: 38 [2022-03-17 18:41:49,855 INFO L226 Difference]: Without dead ends: 38 [2022-03-17 18:41:49,855 INFO L911 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 [2022-03-17 18:41:49,862 INFO L912 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 [2022-03-17 18:41:49,863 INFO L913 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] [2022-03-17 18:41:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-17 18:41:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-17 18:41:49,872 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) [2022-03-17 18:41:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-17 18:41:49,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-03-17 18:41:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:41:49,873 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-17 18:41:49,873 INFO L479 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) [2022-03-17 18:41:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-17 18:41:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 18:41:49,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:41:49,874 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:41:49,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 18:41:50,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:50,088 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:41:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:41:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times [2022-03-17 18:41:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:41:50,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969176416] [2022-03-17 18:41:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:41:50,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:41:50,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906906618] [2022-03-17 18:41:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:50,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:50,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:41:50,101 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) [2022-03-17 18:41:50,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 18:41:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:50,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 18:41:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:41:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 18:41:50,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:41:50,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:41:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969176416] [2022-03-17 18:41:50,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:41:50,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906906618] [2022-03-17 18:41:50,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906906618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:41:50,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:41:50,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 18:41:50,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69160062] [2022-03-17 18:41:50,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:41:50,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:41:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:41:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:41:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 18:41:50,220 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) [2022-03-17 18:41:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:41:50,252 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-17 18:41:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:41:50,253 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 [2022-03-17 18:41:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:41:50,254 INFO L225 Difference]: With dead ends: 42 [2022-03-17 18:41:50,255 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 18:41:50,255 INFO L911 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 [2022-03-17 18:41:50,256 INFO L912 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 [2022-03-17 18:41:50,256 INFO L913 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] [2022-03-17 18:41:50,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 18:41:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-17 18:41:50,261 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) [2022-03-17 18:41:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-17 18:41:50,263 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-03-17 18:41:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:41:50,263 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-17 18:41:50,264 INFO L479 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) [2022-03-17 18:41:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-17 18:41:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 18:41:50,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:41:50,265 INFO L500 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] [2022-03-17 18:41:50,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 18:41:50,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:50,480 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:41:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:41:50,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2022-03-17 18:41:50,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:41:50,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775476116] [2022-03-17 18:41:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:50,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:41:50,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:41:50,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473922210] [2022-03-17 18:41:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:50,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:50,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:41:50,489 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) [2022-03-17 18:41:50,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 18:41:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:50,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 18:41:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:41:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:41:50,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:41:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:41:50,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:41:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775476116] [2022-03-17 18:41:50,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:41:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473922210] [2022-03-17 18:41:50,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473922210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:41:50,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:41:50,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 18:41:50,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973386248] [2022-03-17 18:41:50,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:41:50,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 18:41:50,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:41:50,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 18:41:50,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 18:41:50,679 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) [2022-03-17 18:41:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:41:50,764 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2022-03-17 18:41:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 18:41:50,764 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 [2022-03-17 18:41:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:41:50,765 INFO L225 Difference]: With dead ends: 71 [2022-03-17 18:41:50,765 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 18:41:50,765 INFO L911 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 [2022-03-17 18:41:50,766 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-03-17 18:41:50,766 INFO L913 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] [2022-03-17 18:41:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 18:41:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-03-17 18:41:50,770 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) [2022-03-17 18:41:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-03-17 18:41:50,771 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 30 [2022-03-17 18:41:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:41:50,771 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-03-17 18:41:50,771 INFO L479 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) [2022-03-17 18:41:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-03-17 18:41:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 18:41:50,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:41:50,772 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:41:50,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 18:41:50,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:50,990 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:41:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:41:50,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2022-03-17 18:41:50,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:41:50,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835586509] [2022-03-17 18:41:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:50,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:41:50,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:41:50,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755113929] [2022-03-17 18:41:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:50,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:41:51,000 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) [2022-03-17 18:41:51,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 18:41:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:41:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 18:41:51,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:41:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 18:41:51,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:41:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 18:41:51,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:41:51,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835586509] [2022-03-17 18:41:51,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:41:51,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755113929] [2022-03-17 18:41:51,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755113929] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 18:41:51,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 18:41:51,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-17 18:41:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644760229] [2022-03-17 18:41:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:41:51,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 18:41:51,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:41:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 18:41:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 18:41:51,199 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) [2022-03-17 18:41:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:41:51,236 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-17 18:41:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 18:41:51,240 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 [2022-03-17 18:41:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:41:51,242 INFO L225 Difference]: With dead ends: 79 [2022-03-17 18:41:51,242 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 18:41:51,242 INFO L911 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 [2022-03-17 18:41:51,243 INFO L912 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 [2022-03-17 18:41:51,243 INFO L913 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] [2022-03-17 18:41:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 18:41:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-17 18:41:51,248 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) [2022-03-17 18:41:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-03-17 18:41:51,249 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 30 [2022-03-17 18:41:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:41:51,249 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-03-17 18:41:51,249 INFO L479 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) [2022-03-17 18:41:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-03-17 18:41:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 18:41:51,250 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:41:51,250 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:41:51,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 18:41:51,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:51,455 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:41:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:41:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2022-03-17 18:41:51,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:41:51,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109389951] [2022-03-17 18:41:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:41:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:41:51,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:41:51,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029658929] [2022-03-17 18:41:51,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 18:41:51,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:51,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:41:51,469 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) [2022-03-17 18:41:51,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 18:41:51,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 18:41:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 18:41:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 18:41:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:41:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 18:41:51,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:41:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 18:41:51,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:41:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109389951] [2022-03-17 18:41:51,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:41:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029658929] [2022-03-17 18:41:51,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029658929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:41:51,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:41:51,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 18:41:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052878658] [2022-03-17 18:41:51,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:41:51,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 18:41:51,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:41:51,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 18:41:51,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 18:41:51,669 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) [2022-03-17 18:41:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:41:51,761 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-03-17 18:41:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 18:41:51,761 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 [2022-03-17 18:41:51,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:41:51,763 INFO L225 Difference]: With dead ends: 77 [2022-03-17 18:41:51,763 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 18:41:51,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-17 18:41:51,763 INFO L912 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 [2022-03-17 18:41:51,764 INFO L913 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] [2022-03-17 18:41:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 18:41:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 18:41:51,764 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) [2022-03-17 18:41:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 18:41:51,765 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-03-17 18:41:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:41:51,765 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 18:41:51,765 INFO L479 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) [2022-03-17 18:41:51,765 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 18:41:51,765 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 18:41:51,767 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 18:41:51,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 18:41:51,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:41:51,986 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-03-17 18:41:51,987 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 18:41:51,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:41:51 BasicIcfg [2022-03-17 18:41:51,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 18:41:51,989 INFO L158 Benchmark]: Toolchain (without parser) took 3400.17ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 146.6MB in the beginning and 150.6MB in the end (delta: -4.0MB). Peak memory consumption was 36.9MB. Max. memory is 8.0GB. [2022-03-17 18:41:51,989 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 195.0MB. Free memory was 163.0MB in the beginning and 162.9MB in the end (delta: 69.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 18:41:51,989 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.55ms. Allocated memory is still 195.0MB. Free memory was 146.4MB in the beginning and 171.7MB in the end (delta: -25.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 18:41:51,989 INFO L158 Benchmark]: Boogie Preprocessor took 17.28ms. Allocated memory is still 195.0MB. Free memory was 171.7MB in the beginning and 170.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 18:41:51,990 INFO L158 Benchmark]: RCFGBuilder took 236.59ms. Allocated memory is still 195.0MB. Free memory was 170.2MB in the beginning and 160.2MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-17 18:41:51,990 INFO L158 Benchmark]: IcfgTransformer took 14.36ms. Allocated memory is still 195.0MB. Free memory was 160.2MB in the beginning and 159.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 18:41:51,990 INFO L158 Benchmark]: TraceAbstraction took 2972.73ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 158.6MB in the beginning and 150.6MB in the end (delta: 8.0MB). Peak memory consumption was 48.9MB. Max. memory is 8.0GB. [2022-03-17 18:41:51,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 195.0MB. Free memory was 163.0MB in the beginning and 162.9MB in the end (delta: 69.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 155.55ms. Allocated memory is still 195.0MB. Free memory was 146.4MB in the beginning and 171.7MB in the end (delta: -25.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.28ms. Allocated memory is still 195.0MB. Free memory was 171.7MB in the beginning and 170.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 236.59ms. Allocated memory is still 195.0MB. Free memory was 170.2MB in the beginning and 160.2MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 14.36ms. Allocated memory is still 195.0MB. Free memory was 160.2MB in the beginning and 159.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2972.73ms. Allocated memory was 195.0MB in the beginning and 234.9MB in the end (delta: 39.8MB). Free memory was 158.6MB in the beginning and 150.6MB in the end (delta: 8.0MB). Peak memory consumption was 48.9MB. 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: 2.9s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.3s 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, 0.2s 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, 0.8s 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! [2022-03-17 18:41:52,011 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...