/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 14:11:02,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 14:11:02,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 14:11:02,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 14:11:02,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 14:11:02,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 14:11:02,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 14:11:02,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 14:11:02,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 14:11:02,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 14:11:02,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 14:11:02,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 14:11:02,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 14:11:02,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 14:11:02,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 14:11:02,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 14:11:02,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 14:11:02,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 14:11:02,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 14:11:03,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 14:11:03,013 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 14:11:03,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 14:11:03,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 14:11:03,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 14:11:03,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 14:11:03,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 14:11:03,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 14:11:03,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 14:11:03,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 14:11:03,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 14:11:03,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 14:11:03,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 14:11:03,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 14:11:03,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 14:11:03,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 14:11:03,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 14:11:03,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 14:11:03,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 14:11:03,066 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 14:11:03,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 14:11:03,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 14:11:03,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 14:11:03,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 14:11:03,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 14:11:03,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 14:11:03,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 14:11:03,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 14:11:03,068 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 14:11:03,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 14:11:03,069 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 14:11:03,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 14:11:03,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 14:11:03,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 14:11:03,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 14:11:03,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:11:03,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 14:11:03,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 14:11:03,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 14:11:03,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 14:11:03,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 14:11:03,071 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 14:11:03,071 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 14:11:03,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 14:11:03,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 14:11:03,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 14:11:03,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 14:11:03,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 14:11:03,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 14:11:03,335 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 14:11:03,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2022-03-18 14:11:03,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a628bf73/ddf34244d68b4ceca7bfafcd6af6f5db/FLAG89d977693 [2022-03-18 14:11:03,815 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 14:11:03,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound5.c [2022-03-18 14:11:03,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a628bf73/ddf34244d68b4ceca7bfafcd6af6f5db/FLAG89d977693 [2022-03-18 14:11:03,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a628bf73/ddf34244d68b4ceca7bfafcd6af6f5db [2022-03-18 14:11:03,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 14:11:03,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 14:11:03,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 14:11:03,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 14:11:03,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 14:11:03,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:11:03" (1/1) ... [2022-03-18 14:11:03,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4382027b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:03, skipping insertion in model container [2022-03-18 14:11:03,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:11:03" (1/1) ... [2022-03-18 14:11:03,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 14:11:03,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 14:11:03,997 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/egcd2-ll_unwindbound5.c[490,503] [2022-03-18 14:11:04,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:11:04,028 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 14:11:04,036 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/egcd2-ll_unwindbound5.c[490,503] [2022-03-18 14:11:04,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:11:04,054 INFO L208 MainTranslator]: Completed translation [2022-03-18 14:11:04,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04 WrapperNode [2022-03-18 14:11:04,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 14:11:04,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 14:11:04,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 14:11:04,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 14:11:04,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (1/1) ... [2022-03-18 14:11:04,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (1/1) ... [2022-03-18 14:11:04,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (1/1) ... [2022-03-18 14:11:04,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (1/1) ... [2022-03-18 14:11:04,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (1/1) ... [2022-03-18 14:11:04,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (1/1) ... [2022-03-18 14:11:04,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (1/1) ... [2022-03-18 14:11:04,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 14:11:04,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 14:11:04,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 14:11:04,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 14:11:04,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (1/1) ... [2022-03-18 14:11:04,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:11:04,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:04,129 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) [2022-03-18 14:11:04,157 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 [2022-03-18 14:11:04,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 14:11:04,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 14:11:04,174 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 14:11:04,175 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 14:11:04,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 14:11:04,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 14:11:04,175 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 14:11:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 14:11:04,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 14:11:04,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 14:11:04,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 14:11:04,257 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 14:11:04,258 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 14:11:04,403 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 14:11:04,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 14:11:04,408 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 14:11:04,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:11:04 BoogieIcfgContainer [2022-03-18 14:11:04,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 14:11:04,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 14:11:04,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 14:11:04,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 14:11:04,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:11:03" (1/3) ... [2022-03-18 14:11:04,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48322e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:11:04, skipping insertion in model container [2022-03-18 14:11:04,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:11:04" (2/3) ... [2022-03-18 14:11:04,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48322e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:11:04, skipping insertion in model container [2022-03-18 14:11:04,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:11:04" (3/3) ... [2022-03-18 14:11:04,423 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound5.c [2022-03-18 14:11:04,428 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 14:11:04,428 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 14:11:04,485 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 14:11:04,513 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-18 14:11:04,513 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 14:11:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 14:11:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 14:11:04,537 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:04,537 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:04,538 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2022-03-18 14:11:04,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:04,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809030517] [2022-03-18 14:11:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:04,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:04,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 14:11:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:04,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 14:11:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:04,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 14:11:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:04,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 14:11:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:04,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 14:11:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:11:04,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:04,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809030517] [2022-03-18 14:11:04,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809030517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:11:04,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:11:04,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 14:11:04,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236494566] [2022-03-18 14:11:04,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:11:04,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 14:11:04,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:04,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 14:11:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 14:11:04,772 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:11:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:04,861 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2022-03-18 14:11:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 14:11:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-18 14:11:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:04,871 INFO L225 Difference]: With dead ends: 72 [2022-03-18 14:11:04,871 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 14:11:04,874 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 14:11:04,877 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:04,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:11:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 14:11:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-18 14:11:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 14:11:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-03-18 14:11:04,910 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-03-18 14:11:04,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:04,910 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-03-18 14:11:04,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:11:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-03-18 14:11:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 14:11:04,912 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:04,912 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:04,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 14:11:04,913 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:04,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2022-03-18 14:11:04,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:04,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972828979] [2022-03-18 14:11:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:04,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:04,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:04,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061886074] [2022-03-18 14:11:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:04,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:04,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:04,938 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) [2022-03-18 14:11:04,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 14:11:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 14:11:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:11:05,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:11:05,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972828979] [2022-03-18 14:11:05,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061886074] [2022-03-18 14:11:05,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061886074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:11:05,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:11:05,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 14:11:05,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230526276] [2022-03-18 14:11:05,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:11:05,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 14:11:05,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:05,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 14:11:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 14:11:05,201 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:11:05,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:05,215 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-03-18 14:11:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 14:11:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 14:11:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:05,216 INFO L225 Difference]: With dead ends: 44 [2022-03-18 14:11:05,217 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 14:11:05,217 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 14:11:05,218 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:05,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:11:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 14:11:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-18 14:11:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 14:11:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-03-18 14:11:05,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-03-18 14:11:05,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:05,229 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-03-18 14:11:05,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:11:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-03-18 14:11:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 14:11:05,230 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:05,230 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:05,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:05,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:05,452 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:05,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2022-03-18 14:11:05,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:05,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769097461] [2022-03-18 14:11:05,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:05,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:05,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202207337] [2022-03-18 14:11:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:05,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:05,470 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) [2022-03-18 14:11:05,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 14:11:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:05,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:11:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 14:11:05,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 14:11:05,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769097461] [2022-03-18 14:11:05,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:05,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202207337] [2022-03-18 14:11:05,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202207337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:11:05,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:11:05,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 14:11:05,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748121584] [2022-03-18 14:11:05,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:05,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 14:11:05,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 14:11:05,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 14:11:05,798 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:11:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:05,896 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-03-18 14:11:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 14:11:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-18 14:11:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:05,900 INFO L225 Difference]: With dead ends: 53 [2022-03-18 14:11:05,900 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 14:11:05,901 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:11:05,903 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:05,903 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 160 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:11:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 14:11:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-03-18 14:11:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 14:11:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-18 14:11:05,913 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-03-18 14:11:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:05,913 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-18 14:11:05,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:11:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-18 14:11:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 14:11:05,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:05,915 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:05,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:06,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 14:11:06,128 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2022-03-18 14:11:06,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:06,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900393595] [2022-03-18 14:11:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:06,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:06,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640155662] [2022-03-18 14:11:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:06,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:06,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:06,146 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) [2022-03-18 14:11:06,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 14:11:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 14:11:06,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 14:11:06,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:11:06,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:06,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900393595] [2022-03-18 14:11:06,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640155662] [2022-03-18 14:11:06,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640155662] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 14:11:06,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:11:06,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 14:11:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60940427] [2022-03-18 14:11:06,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:11:06,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:11:06,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:11:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:11:06,457 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 14:11:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:06,504 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-03-18 14:11:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:11:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-03-18 14:11:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:06,507 INFO L225 Difference]: With dead ends: 43 [2022-03-18 14:11:06,507 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 14:11:06,508 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:11:06,509 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:06,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:11:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 14:11:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 14:11:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 14:11:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-18 14:11:06,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 36 [2022-03-18 14:11:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:06,517 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-18 14:11:06,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 14:11:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-18 14:11:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 14:11:06,519 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:06,519 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:06,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:06,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:06,732 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2022-03-18 14:11:06,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:06,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703174536] [2022-03-18 14:11:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:06,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:06,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:06,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950624387] [2022-03-18 14:11:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:06,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:06,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:06,746 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) [2022-03-18 14:11:06,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 14:11:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:06,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:11:06,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:11:06,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:11:06,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703174536] [2022-03-18 14:11:06,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950624387] [2022-03-18 14:11:06,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950624387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:11:06,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:11:06,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:11:06,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855999172] [2022-03-18 14:11:06,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:11:06,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:11:06,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:11:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:11:06,885 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:11:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:06,909 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-18 14:11:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:11:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-18 14:11:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:06,911 INFO L225 Difference]: With dead ends: 66 [2022-03-18 14:11:06,911 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 14:11:06,911 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:11:06,912 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:06,912 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:11:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 14:11:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 14:11:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 14:11:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-03-18 14:11:06,920 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2022-03-18 14:11:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:06,920 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-03-18 14:11:06,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 14:11:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-03-18 14:11:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 14:11:06,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:06,922 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:06,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 14:11:07,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:07,148 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:07,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2022-03-18 14:11:07,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:07,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328111545] [2022-03-18 14:11:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:07,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:07,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:07,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913292411] [2022-03-18 14:11:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:07,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:07,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:07,160 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) [2022-03-18 14:11:07,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 14:11:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:07,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 14:11:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 14:11:07,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 14:11:07,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:07,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328111545] [2022-03-18 14:11:07,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913292411] [2022-03-18 14:11:07,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913292411] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 14:11:07,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:11:07,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 14:11:07,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946590466] [2022-03-18 14:11:07,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:11:07,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:11:07,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:07,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:11:07,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:11:07,523 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 14:11:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:07,561 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-18 14:11:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:11:07,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-18 14:11:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:07,564 INFO L225 Difference]: With dead ends: 57 [2022-03-18 14:11:07,564 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 14:11:07,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:11:07,568 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:07,569 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:11:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 14:11:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-18 14:11:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 14:11:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-03-18 14:11:07,589 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 41 [2022-03-18 14:11:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:07,591 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-03-18 14:11:07,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 14:11:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-03-18 14:11:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 14:11:07,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:07,596 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:07,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:07,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:07,812 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2022-03-18 14:11:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:07,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493647584] [2022-03-18 14:11:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:07,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:07,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:07,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347450579] [2022-03-18 14:11:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:07,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:07,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:07,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:07,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 14:11:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:07,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 14:11:07,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 14:11:08,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 14:11:08,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493647584] [2022-03-18 14:11:08,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347450579] [2022-03-18 14:11:08,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347450579] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 14:11:08,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:11:08,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 14:11:08,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767504479] [2022-03-18 14:11:08,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:11:08,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:11:08,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:08,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:11:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:11:08,169 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 14:11:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:08,213 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-03-18 14:11:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:11:08,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-03-18 14:11:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:08,214 INFO L225 Difference]: With dead ends: 61 [2022-03-18 14:11:08,214 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 14:11:08,215 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:11:08,215 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:08,216 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:11:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 14:11:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-18 14:11:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 14:11:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-03-18 14:11:08,224 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 46 [2022-03-18 14:11:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:08,224 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-03-18 14:11:08,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 14:11:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-03-18 14:11:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 14:11:08,225 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:08,225 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:08,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:08,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:08,446 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:08,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:08,447 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2022-03-18 14:11:08,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:08,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233913352] [2022-03-18 14:11:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:08,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:08,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:08,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715138845] [2022-03-18 14:11:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:08,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:08,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:08,464 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:08,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 14:11:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 14:11:08,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 14:11:08,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:08,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:08,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233913352] [2022-03-18 14:11:08,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:08,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715138845] [2022-03-18 14:11:08,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715138845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:11:08,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:11:08,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 14:11:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956533012] [2022-03-18 14:11:08,900 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:08,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 14:11:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 14:11:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-18 14:11:08,901 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 14:11:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:09,089 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-03-18 14:11:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 14:11:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-18 14:11:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:09,092 INFO L225 Difference]: With dead ends: 65 [2022-03-18 14:11:09,092 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 14:11:09,092 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-18 14:11:09,093 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:09,093 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 189 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:11:09,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 14:11:09,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-18 14:11:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 14:11:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-03-18 14:11:09,107 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2022-03-18 14:11:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:09,108 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-03-18 14:11:09,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 14:11:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-03-18 14:11:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 14:11:09,111 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:09,111 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:09,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:09,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:09,328 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2022-03-18 14:11:09,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:09,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649354870] [2022-03-18 14:11:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:09,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:09,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:09,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094907142] [2022-03-18 14:11:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:09,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:09,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:09,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:09,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 14:11:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:09,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 14:11:09,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 14:11:09,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 14:11:09,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:09,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649354870] [2022-03-18 14:11:09,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:09,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094907142] [2022-03-18 14:11:09,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094907142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:11:09,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:11:09,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-18 14:11:09,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012937491] [2022-03-18 14:11:09,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:09,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 14:11:09,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 14:11:09,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:11:09,665 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-18 14:11:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:09,789 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2022-03-18 14:11:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 14:11:09,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) Word has length 60 [2022-03-18 14:11:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:09,792 INFO L225 Difference]: With dead ends: 173 [2022-03-18 14:11:09,792 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 14:11:09,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-18 14:11:09,793 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 61 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:09,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 253 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:11:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 14:11:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2022-03-18 14:11:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 104 states have internal predecessors, (119), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 14:11:09,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-03-18 14:11:09,810 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 60 [2022-03-18 14:11:09,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:09,810 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-03-18 14:11:09,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-18 14:11:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-03-18 14:11:09,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 14:11:09,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:09,811 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:09,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:10,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 14:11:10,012 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2022-03-18 14:11:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536505329] [2022-03-18 14:11:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:10,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:10,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:10,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184991377] [2022-03-18 14:11:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:10,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:10,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:10,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 14:11:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:10,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 14:11:10,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 14:11:10,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-18 14:11:10,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:10,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536505329] [2022-03-18 14:11:10,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:10,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184991377] [2022-03-18 14:11:10,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184991377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:11:10,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:11:10,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 14:11:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496794937] [2022-03-18 14:11:10,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:10,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 14:11:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:10,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 14:11:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:11:10,323 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 14:11:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:10,480 INFO L93 Difference]: Finished difference Result 225 states and 292 transitions. [2022-03-18 14:11:10,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 14:11:10,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-18 14:11:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:10,482 INFO L225 Difference]: With dead ends: 225 [2022-03-18 14:11:10,482 INFO L226 Difference]: Without dead ends: 211 [2022-03-18 14:11:10,483 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-18 14:11:10,483 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 59 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:10,483 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 455 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:11:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-18 14:11:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 189. [2022-03-18 14:11:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 124 states have internal predecessors, (148), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 14:11:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 237 transitions. [2022-03-18 14:11:10,502 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 237 transitions. Word has length 61 [2022-03-18 14:11:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:10,503 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 237 transitions. [2022-03-18 14:11:10,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 14:11:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 237 transitions. [2022-03-18 14:11:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 14:11:10,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:10,504 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:10,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:10,718 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 14:11:10,719 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash 428029148, now seen corresponding path program 1 times [2022-03-18 14:11:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783560522] [2022-03-18 14:11:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:10,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:10,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141192919] [2022-03-18 14:11:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:10,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:10,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:10,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:10,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 14:11:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 14:11:10,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 14:11:10,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-18 14:11:11,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:11,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783560522] [2022-03-18 14:11:11,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:11,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141192919] [2022-03-18 14:11:11,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141192919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:11:11,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:11:11,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-18 14:11:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457925399] [2022-03-18 14:11:11,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:11,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 14:11:11,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 14:11:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:11:11,033 INFO L87 Difference]: Start difference. First operand 189 states and 237 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-18 14:11:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:11,135 INFO L93 Difference]: Finished difference Result 269 states and 350 transitions. [2022-03-18 14:11:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 14:11:11,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) Word has length 63 [2022-03-18 14:11:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:11,137 INFO L225 Difference]: With dead ends: 269 [2022-03-18 14:11:11,137 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 14:11:11,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-18 14:11:11,139 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:11,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 171 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:11:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 14:11:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-03-18 14:11:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 128 states have (on average 1.1796875) internal successors, (151), 130 states have internal predecessors, (151), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 14:11:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2022-03-18 14:11:11,157 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 63 [2022-03-18 14:11:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:11,157 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2022-03-18 14:11:11,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-18 14:11:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2022-03-18 14:11:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 14:11:11,158 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:11,158 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:11,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:11,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 14:11:11,375 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2022-03-18 14:11:11,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:11,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441103650] [2022-03-18 14:11:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:11,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:11,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:11,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044444320] [2022-03-18 14:11:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:11,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:11,386 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:11,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 14:11:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:11,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 14:11:11,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 14:11:11,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 14:11:11,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441103650] [2022-03-18 14:11:11,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044444320] [2022-03-18 14:11:11,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044444320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:11:11,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:11:11,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 14:11:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419431537] [2022-03-18 14:11:11,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:11,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 14:11:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 14:11:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-18 14:11:11,863 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 14:11:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:12,193 INFO L93 Difference]: Finished difference Result 272 states and 358 transitions. [2022-03-18 14:11:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 14:11:12,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 68 [2022-03-18 14:11:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:12,197 INFO L225 Difference]: With dead ends: 272 [2022-03-18 14:11:12,197 INFO L226 Difference]: Without dead ends: 267 [2022-03-18 14:11:12,199 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-18 14:11:12,199 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 42 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:12,200 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 384 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 14:11:12,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-18 14:11:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 237. [2022-03-18 14:11:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 156 states have (on average 1.2115384615384615) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 23 states have call predecessors, (58), 22 states have return successors, (54), 49 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-18 14:11:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 301 transitions. [2022-03-18 14:11:12,228 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 301 transitions. Word has length 68 [2022-03-18 14:11:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:12,229 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 301 transitions. [2022-03-18 14:11:12,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 14:11:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 301 transitions. [2022-03-18 14:11:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 14:11:12,230 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:12,230 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:12,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:12,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 14:11:12,454 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:12,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2022-03-18 14:11:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:12,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115151993] [2022-03-18 14:11:12,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:12,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:12,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:12,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200810982] [2022-03-18 14:11:12,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 14:11:12,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:12,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:12,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:12,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 14:11:12,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 14:11:12,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:11:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 14:11:12,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 14:11:12,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 14:11:13,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:13,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115151993] [2022-03-18 14:11:13,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:13,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200810982] [2022-03-18 14:11:13,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200810982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:11:13,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:11:13,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-18 14:11:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474554607] [2022-03-18 14:11:13,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:13,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 14:11:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:13,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 14:11:13,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-18 14:11:13,234 INFO L87 Difference]: Start difference. First operand 237 states and 301 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-18 14:11:15,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:11:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:16,540 INFO L93 Difference]: Finished difference Result 256 states and 325 transitions. [2022-03-18 14:11:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 14:11:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 73 [2022-03-18 14:11:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:16,546 INFO L225 Difference]: With dead ends: 256 [2022-03-18 14:11:16,546 INFO L226 Difference]: Without dead ends: 253 [2022-03-18 14:11:16,546 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-18 14:11:16,547 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 67 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 107 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:16,547 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 259 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 14:11:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-18 14:11:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 243. [2022-03-18 14:11:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 162 states have (on average 1.2037037037037037) internal successors, (195), 169 states have internal predecessors, (195), 56 states have call successors, (56), 25 states have call predecessors, (56), 24 states have return successors, (53), 48 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-18 14:11:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 304 transitions. [2022-03-18 14:11:16,587 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 304 transitions. Word has length 73 [2022-03-18 14:11:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:16,607 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 304 transitions. [2022-03-18 14:11:16,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-18 14:11:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 304 transitions. [2022-03-18 14:11:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 14:11:16,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:16,608 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:16,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:16,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 14:11:16,831 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2022-03-18 14:11:16,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:16,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416415866] [2022-03-18 14:11:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:16,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:16,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:16,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846281067] [2022-03-18 14:11:16,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 14:11:16,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:16,841 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:16,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 14:11:16,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 14:11:16,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:11:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 14:11:16,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 14:11:17,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:17,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:17,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416415866] [2022-03-18 14:11:17,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:17,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846281067] [2022-03-18 14:11:17,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846281067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:11:17,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:11:17,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 14:11:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706789714] [2022-03-18 14:11:17,510 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:17,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 14:11:17,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:17,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 14:11:17,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:11:17,511 INFO L87 Difference]: Start difference. First operand 243 states and 304 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 14:11:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:17,757 INFO L93 Difference]: Finished difference Result 266 states and 331 transitions. [2022-03-18 14:11:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 14:11:17,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-03-18 14:11:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:17,759 INFO L225 Difference]: With dead ends: 266 [2022-03-18 14:11:17,759 INFO L226 Difference]: Without dead ends: 262 [2022-03-18 14:11:17,760 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:11:17,760 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 23 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:17,760 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 281 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 14:11:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-18 14:11:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2022-03-18 14:11:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 173 states have (on average 1.1965317919075145) internal successors, (207), 179 states have internal predecessors, (207), 60 states have call successors, (60), 28 states have call predecessors, (60), 26 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2022-03-18 14:11:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 324 transitions. [2022-03-18 14:11:17,786 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 324 transitions. Word has length 78 [2022-03-18 14:11:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:17,787 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 324 transitions. [2022-03-18 14:11:17,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 14:11:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 324 transitions. [2022-03-18 14:11:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 14:11:17,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:17,788 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:17,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:18,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 14:11:18,008 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2022-03-18 14:11:18,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:18,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119802434] [2022-03-18 14:11:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:18,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:18,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:18,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512358679] [2022-03-18 14:11:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:18,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:18,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 14:11:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:18,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 14:11:18,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-18 14:11:18,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-18 14:11:19,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:19,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119802434] [2022-03-18 14:11:19,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:19,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512358679] [2022-03-18 14:11:19,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512358679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:11:19,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:11:19,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-18 14:11:19,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678481173] [2022-03-18 14:11:19,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:19,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 14:11:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:19,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 14:11:19,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-18 14:11:19,179 INFO L87 Difference]: Start difference. First operand 260 states and 324 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-18 14:11:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:22,579 INFO L93 Difference]: Finished difference Result 327 states and 422 transitions. [2022-03-18 14:11:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 14:11:22,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 84 [2022-03-18 14:11:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:22,582 INFO L225 Difference]: With dead ends: 327 [2022-03-18 14:11:22,582 INFO L226 Difference]: Without dead ends: 317 [2022-03-18 14:11:22,583 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 14:11:22,583 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 103 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:22,583 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 509 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 14:11:22,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-18 14:11:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 301. [2022-03-18 14:11:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 197 states have (on average 1.2233502538071066) internal successors, (241), 202 states have internal predecessors, (241), 76 states have call successors, (76), 28 states have call predecessors, (76), 27 states have return successors, (74), 70 states have call predecessors, (74), 74 states have call successors, (74) [2022-03-18 14:11:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 391 transitions. [2022-03-18 14:11:22,626 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 391 transitions. Word has length 84 [2022-03-18 14:11:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:22,626 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 391 transitions. [2022-03-18 14:11:22,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-18 14:11:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 391 transitions. [2022-03-18 14:11:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 14:11:22,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:22,628 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:22,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:22,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:22,843 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash 325787368, now seen corresponding path program 1 times [2022-03-18 14:11:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:22,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418967852] [2022-03-18 14:11:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:22,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535610697] [2022-03-18 14:11:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:22,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:22,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:22,860 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:22,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 14:11:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 14:11:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-18 14:11:23,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:11:23,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418967852] [2022-03-18 14:11:23,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535610697] [2022-03-18 14:11:23,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535610697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:11:23,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:11:23,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:11:23,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554324868] [2022-03-18 14:11:23,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:11:23,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:11:23,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:11:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:11:23,047 INFO L87 Difference]: Start difference. First operand 301 states and 391 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-18 14:11:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:23,127 INFO L93 Difference]: Finished difference Result 470 states and 653 transitions. [2022-03-18 14:11:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 14:11:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2022-03-18 14:11:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:23,130 INFO L225 Difference]: With dead ends: 470 [2022-03-18 14:11:23,130 INFO L226 Difference]: Without dead ends: 358 [2022-03-18 14:11:23,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 14:11:23,131 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 11 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:23,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 188 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:11:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-18 14:11:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 327. [2022-03-18 14:11:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 217 states have internal predecessors, (262), 86 states have call successors, (86), 28 states have call predecessors, (86), 27 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-18 14:11:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 432 transitions. [2022-03-18 14:11:23,177 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 432 transitions. Word has length 93 [2022-03-18 14:11:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:23,177 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 432 transitions. [2022-03-18 14:11:23,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-18 14:11:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 432 transitions. [2022-03-18 14:11:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 14:11:23,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:23,179 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:23,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:23,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 14:11:23,404 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2022-03-18 14:11:23,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:23,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146007567] [2022-03-18 14:11:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:23,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:23,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:23,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640777158] [2022-03-18 14:11:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:23,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:23,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:23,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:23,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 14:11:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:11:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 14:11:23,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:11:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-18 14:11:24,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:11:24,693 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 14:11:29,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:11:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146007567] [2022-03-18 14:11:29,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:11:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640777158] [2022-03-18 14:11:29,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640777158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:11:29,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:11:29,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 14:11:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37121129] [2022-03-18 14:11:29,697 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:11:29,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 14:11:29,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:11:29,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 14:11:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2022-03-18 14:11:29,698 INFO L87 Difference]: Start difference. First operand 327 states and 432 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 14:11:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:11:30,267 INFO L93 Difference]: Finished difference Result 339 states and 442 transitions. [2022-03-18 14:11:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 14:11:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2022-03-18 14:11:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:11:30,270 INFO L225 Difference]: With dead ends: 339 [2022-03-18 14:11:30,270 INFO L226 Difference]: Without dead ends: 337 [2022-03-18 14:11:30,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=71, Invalid=269, Unknown=2, NotChecked=0, Total=342 [2022-03-18 14:11:30,271 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 33 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 14:11:30,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 361 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 14:11:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-18 14:11:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2022-03-18 14:11:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 219 states have (on average 1.2237442922374429) internal successors, (268), 223 states have internal predecessors, (268), 86 states have call successors, (86), 30 states have call predecessors, (86), 29 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-18 14:11:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 438 transitions. [2022-03-18 14:11:30,320 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 438 transitions. Word has length 101 [2022-03-18 14:11:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:11:30,320 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 438 transitions. [2022-03-18 14:11:30,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-18 14:11:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 438 transitions. [2022-03-18 14:11:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 14:11:30,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:11:30,322 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:30,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 14:11:30,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 14:11:30,545 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:11:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:11:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 1 times [2022-03-18 14:11:30,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:11:30,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594260083] [2022-03-18 14:11:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:30,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:11:30,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:11:30,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888714164] [2022-03-18 14:11:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:11:30,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:11:30,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:11:30,554 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:11:30,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 14:11:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 14:11:30,607 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 14:11:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 14:11:30,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 14:11:30,671 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 14:11:30,672 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 14:11:30,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 14:11:30,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 14:11:30,900 INFO L718 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:11:30,902 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 14:11:30,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 02:11:30 BoogieIcfgContainer [2022-03-18 14:11:30,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 14:11:30,949 INFO L158 Benchmark]: Toolchain (without parser) took 27111.24ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 141.3MB in the beginning and 132.1MB in the end (delta: 9.2MB). Peak memory consumption was 48.4MB. Max. memory is 8.0GB. [2022-03-18 14:11:30,949 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 190.8MB. Free memory is still 157.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 14:11:30,949 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.72ms. Allocated memory is still 190.8MB. Free memory was 141.1MB in the beginning and 168.0MB in the end (delta: -26.8MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. [2022-03-18 14:11:30,949 INFO L158 Benchmark]: Boogie Preprocessor took 29.28ms. Allocated memory is still 190.8MB. Free memory was 168.0MB in the beginning and 166.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 14:11:30,949 INFO L158 Benchmark]: RCFGBuilder took 325.44ms. Allocated memory is still 190.8MB. Free memory was 166.4MB in the beginning and 155.1MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 14:11:30,950 INFO L158 Benchmark]: TraceAbstraction took 26536.60ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 154.5MB in the beginning and 132.1MB in the end (delta: 22.4MB). Peak memory consumption was 61.5MB. Max. memory is 8.0GB. [2022-03-18 14:11:30,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 190.8MB. Free memory is still 157.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 215.72ms. Allocated memory is still 190.8MB. Free memory was 141.1MB in the beginning and 168.0MB in the end (delta: -26.8MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.28ms. Allocated memory is still 190.8MB. Free memory was 168.0MB in the beginning and 166.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 325.44ms. Allocated memory is still 190.8MB. Free memory was 166.4MB in the beginning and 155.1MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 26536.60ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 154.5MB in the beginning and 132.1MB in the end (delta: 22.4MB). Peak memory consumption was 61.5MB. 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 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=9, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=3, y=4] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=3, y=4] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=3, b=4, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=4, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=3, b=4, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=4, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, xy=12, y=4, yy=16] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=4, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L40] COND TRUE counter++<5 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=4, b=3, c=4, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=4, b=3, c=4, counter=4, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [\old(counter)=0, a=4, b=3, c=1, counter=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] EXPR counter++ VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, counter++=4, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L46] COND TRUE counter++<5 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L51] COND TRUE !(c >= b) VAL [\old(counter)=0, a=4, b=3, c=1, counter=5, k=1, p=0, q=1, r=1, s=0, temp=0, x=3, xy=12, y=4, yy=16] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=3, b=1, c=1, counter=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=3, xy=12, y=4, yy=16] [L40] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, c=1, counter=6, counter++=5, k=1, p=1, q=-1, r=0, s=1, temp=1, x=3, xy=12, y=4, yy=16] [L40] COND FALSE !(counter++<5) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.4s, OverallIterations: 18, TraceHistogramMax: 13, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 9.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 611 SdHoareTripleChecker+Valid, 7.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 559 mSDsluCounter, 3971 SdHoareTripleChecker+Invalid, 7.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3160 mSDsCounter, 554 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2265 IncrementalHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 554 mSolverCounterUnsat, 811 mSDtfsCounter, 2265 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1632 GetRequests, 1428 SyntacticMatches, 13 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=335occurred in iteration=17, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 133 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 1103 NumberOfCodeBlocks, 1083 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1532 ConstructedInterpolants, 0 QuantifiedInterpolants, 6396 SizeOfPredicates, 66 NumberOfNonLiveVariables, 3006 ConjunctsInSsa, 312 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 1781/1978 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-18 14:11:30,979 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...