/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:02:08,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:02:08,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:02:08,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 02:02:08,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 02:02:08,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 02:02:08,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 02:02:08,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 02:02:08,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 02:02:08,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 02:02:08,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 02:02:08,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 02:02:08,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:02:08,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:02:08,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:02:08,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:02:08,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:02:08,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:02:08,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:02:08,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:02:08,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:02:08,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:02:08,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:02:08,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:02:08,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 02:02:08,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 02:02:08,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 02:02:08,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 02:02:08,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 02:02:08,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 02:02:08,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 02:02:08,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 02:02:08,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 02:02:08,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 02:02:08,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 02:02:08,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 02:02:08,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 02:02:08,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 02:02:08,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:02:08,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:02:08,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:02:08,580 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 [2023-04-02 02:02:08,603 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:02:08,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:02:08,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:02:08,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:02:08,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:02:08,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:02:08,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:02:08,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:02:08,606 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:02:08,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:02:08,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:02:08,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:02:08,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:02:08,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:02:08,609 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:02:08,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:02:08,609 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:02:08,609 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:02:08,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:02:08,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:02:08,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:02:08,814 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:02:08,814 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:02:08,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2023-04-02 02:02:09,715 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:02:09,849 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:02:09,849 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2023-04-02 02:02:09,853 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7286553b6/ba7faf4fede542fd99a27054336d2ee5/FLAG67c362df1 [2023-04-02 02:02:09,863 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7286553b6/ba7faf4fede542fd99a27054336d2ee5 [2023-04-02 02:02:09,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:02:09,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:02:09,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:02:09,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:02:09,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:02:09,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:02:09" (1/1) ... [2023-04-02 02:02:09,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6094b4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:09, skipping insertion in model container [2023-04-02 02:02:09,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:02:09" (1/1) ... [2023-04-02 02:02:09,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:02:09,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:02:09,979 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i[950,963] [2023-04-02 02:02:09,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:02:09,996 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:02:10,004 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i[950,963] [2023-04-02 02:02:10,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:02:10,018 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:02:10,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10 WrapperNode [2023-04-02 02:02:10,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:02:10,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:02:10,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:02:10,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:02:10,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,036 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:02:10,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:02:10,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:02:10,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:02:10,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (1/1) ... [2023-04-02 02:02:10,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:02:10,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:10,060 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) [2023-04-02 02:02:10,064 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 [2023-04-02 02:02:10,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:02:10,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:02:10,088 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:02:10,088 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:02:10,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:02:10,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:02:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:02:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:02:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 02:02:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 02:02:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:02:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:02:10,148 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:02:10,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:02:10,312 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:02:10,315 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:02:10,327 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 02:02:10,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:02:10 BoogieIcfgContainer [2023-04-02 02:02:10,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:02:10,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:02:10,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:02:10,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:02:10,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:02:09" (1/3) ... [2023-04-02 02:02:10,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:02:10, skipping insertion in model container [2023-04-02 02:02:10,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:02:10" (2/3) ... [2023-04-02 02:02:10,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:02:10, skipping insertion in model container [2023-04-02 02:02:10,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:02:10" (3/3) ... [2023-04-02 02:02:10,333 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2023-04-02 02:02:10,357 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:02:10,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:02:10,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:02:10,408 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@278d5fe1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:02:10,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:02:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 02:02:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 02:02:10,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:10,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:02:10,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:10,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 878397729, now seen corresponding path program 1 times [2023-04-02 02:02:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189442495] [2023-04-02 02:02:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:10,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:10,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189442495] [2023-04-02 02:02:10,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 02:02:10,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796291848] [2023-04-02 02:02:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:10,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:10,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:10,569 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) [2023-04-02 02:02:10,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 02:02:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:10,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 02:02:10,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 02:02:10,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:02:10,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796291848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:02:10,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:02:10,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 02:02:10,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942563134] [2023-04-02 02:02:10,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:02:10,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 02:02:10,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:10,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 02:02:10,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:02:10,675 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:02:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:02:10,688 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2023-04-02 02:02:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 02:02:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-04-02 02:02:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:02:10,694 INFO L225 Difference]: With dead ends: 59 [2023-04-02 02:02:10,694 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 02:02:10,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:02:10,698 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:02:10,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:02:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 02:02:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 02:02:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 02:02:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-04-02 02:02:10,722 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2023-04-02 02:02:10,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:02:10,722 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-04-02 02:02:10,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:02:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-04-02 02:02:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 02:02:10,723 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:10,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:02:10,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 02:02:10,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 02:02:10,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:10,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash 994169231, now seen corresponding path program 1 times [2023-04-02 02:02:10,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:10,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292830979] [2023-04-02 02:02:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:10,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:10,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:02:10,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118944009] [2023-04-02 02:02:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:10,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:10,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:10,956 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) [2023-04-02 02:02:10,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 02:02:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:11,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:02:11,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:11,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:02:11,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:11,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292830979] [2023-04-02 02:02:11,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:02:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118944009] [2023-04-02 02:02:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118944009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:02:11,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:02:11,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 02:02:11,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918317127] [2023-04-02 02:02:11,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:02:11,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 02:02:11,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 02:02:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:02:11,094 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:02:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:02:11,105 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-04-02 02:02:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:02:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-04-02 02:02:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:02:11,107 INFO L225 Difference]: With dead ends: 42 [2023-04-02 02:02:11,107 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 02:02:11,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 02:02:11,108 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 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 [2023-04-02 02:02:11,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:02:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 02:02:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 02:02:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 02:02:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-04-02 02:02:11,113 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2023-04-02 02:02:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:02:11,114 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-04-02 02:02:11,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:02:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-04-02 02:02:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 02:02:11,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:11,115 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:02:11,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 02:02:11,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 02:02:11,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:11,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash 422434646, now seen corresponding path program 1 times [2023-04-02 02:02:11,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:11,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964381310] [2023-04-02 02:02:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:11,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:11,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:02:11,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915187421] [2023-04-02 02:02:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:11,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:11,338 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) [2023-04-02 02:02:11,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 02:02:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:11,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:02:11,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:11,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:02:11,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:11,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964381310] [2023-04-02 02:02:11,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:02:11,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915187421] [2023-04-02 02:02:11,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915187421] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:02:11,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:02:11,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:02:11,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284757751] [2023-04-02 02:02:11,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:02:11,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:02:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:11,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:02:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:02:11,469 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:02:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:02:11,492 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-04-02 02:02:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 02:02:11,492 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-04-02 02:02:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:02:11,493 INFO L225 Difference]: With dead ends: 41 [2023-04-02 02:02:11,493 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 02:02:11,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:02:11,494 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:02:11,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:02:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 02:02:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-04-02 02:02:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 02:02:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-04-02 02:02:11,502 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2023-04-02 02:02:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:02:11,502 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-04-02 02:02:11,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:02:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-04-02 02:02:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 02:02:11,504 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:11,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:02:11,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 02:02:11,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:11,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:11,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash 424222106, now seen corresponding path program 1 times [2023-04-02 02:02:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:11,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972369870] [2023-04-02 02:02:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:11,740 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:02:11,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489229889] [2023-04-02 02:02:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:11,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:11,743 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) [2023-04-02 02:02:11,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 02:02:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:11,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 02:02:11,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:11,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:02:11,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972369870] [2023-04-02 02:02:11,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:02:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489229889] [2023-04-02 02:02:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489229889] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:02:11,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:02:11,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 02:02:11,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734016098] [2023-04-02 02:02:11,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:02:11,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 02:02:11,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:11,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 02:02:11,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:02:11,940 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:02:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:02:12,050 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2023-04-02 02:02:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:02:12,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-04-02 02:02:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:02:12,052 INFO L225 Difference]: With dead ends: 42 [2023-04-02 02:02:12,052 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 02:02:12,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:02:12,053 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:02:12,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 159 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:02:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 02:02:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-02 02:02:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 02:02:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-02 02:02:12,059 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2023-04-02 02:02:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:02:12,060 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-02 02:02:12,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 02:02:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-02 02:02:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 02:02:12,060 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:12,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:02:12,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 02:02:12,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:12,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:12,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash -193375877, now seen corresponding path program 1 times [2023-04-02 02:02:12,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:12,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125861061] [2023-04-02 02:02:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:12,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:12,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:02:12,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417474448] [2023-04-02 02:02:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:12,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:12,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:12,279 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) [2023-04-02 02:02:12,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 02:02:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:12,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:02:12,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:12,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:02:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:12,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:12,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125861061] [2023-04-02 02:02:12,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:02:12,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417474448] [2023-04-02 02:02:12,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417474448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:02:12,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:02:12,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 02:02:12,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281008766] [2023-04-02 02:02:12,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:02:12,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 02:02:12,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 02:02:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 02:02:12,399 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 02:02:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:02:12,439 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2023-04-02 02:02:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 02:02:12,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-04-02 02:02:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:02:12,440 INFO L225 Difference]: With dead ends: 73 [2023-04-02 02:02:12,440 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 02:02:12,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:02:12,441 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:02:12,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:02:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 02:02:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2023-04-02 02:02:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 02:02:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2023-04-02 02:02:12,447 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 28 [2023-04-02 02:02:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:02:12,447 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2023-04-02 02:02:12,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 02:02:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2023-04-02 02:02:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 02:02:12,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:12,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:02:12,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 02:02:12,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:12,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:12,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:12,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2031725334, now seen corresponding path program 1 times [2023-04-02 02:02:12,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:12,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347185680] [2023-04-02 02:02:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:12,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:12,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:02:12,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559532374] [2023-04-02 02:02:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:12,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:12,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:12,666 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) [2023-04-02 02:02:12,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 02:02:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:12,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:02:12,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:12,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:02:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:12,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:12,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347185680] [2023-04-02 02:02:12,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:02:12,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559532374] [2023-04-02 02:02:12,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559532374] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:02:12,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:02:12,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-02 02:02:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450671725] [2023-04-02 02:02:12,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:02:12,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 02:02:12,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:12,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 02:02:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:02:12,784 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 02:02:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:02:12,842 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2023-04-02 02:02:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 02:02:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2023-04-02 02:02:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:02:12,844 INFO L225 Difference]: With dead ends: 98 [2023-04-02 02:02:12,844 INFO L226 Difference]: Without dead ends: 91 [2023-04-02 02:02:12,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:02:12,844 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:02:12,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 170 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:02:12,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-02 02:02:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2023-04-02 02:02:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 67 states have internal predecessors, (85), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:02:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2023-04-02 02:02:12,853 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 29 [2023-04-02 02:02:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:02:12,853 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2023-04-02 02:02:12,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 02:02:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2023-04-02 02:02:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 02:02:12,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:12,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:02:12,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 02:02:13,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:13,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:13,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2029937874, now seen corresponding path program 1 times [2023-04-02 02:02:13,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:13,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311604261] [2023-04-02 02:02:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:13,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:13,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:02:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648245334] [2023-04-02 02:02:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:13,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:13,070 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) [2023-04-02 02:02:13,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 02:02:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:13,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 02:02:13,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:02:13,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:02:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:13,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:13,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311604261] [2023-04-02 02:02:13,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:02:13,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648245334] [2023-04-02 02:02:13,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648245334] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:02:13,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:02:13,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-04-02 02:02:13,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24391216] [2023-04-02 02:02:13,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:02:13,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:02:13,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:02:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:02:13,384 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 02:02:15,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-02 02:02:17,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-02 02:02:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:02:17,535 INFO L93 Difference]: Finished difference Result 146 states and 185 transitions. [2023-04-02 02:02:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 02:02:17,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-04-02 02:02:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:02:17,537 INFO L225 Difference]: With dead ends: 146 [2023-04-02 02:02:17,537 INFO L226 Difference]: Without dead ends: 140 [2023-04-02 02:02:17,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:02:17,538 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:02:17,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 101 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 02:02:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-04-02 02:02:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 113. [2023-04-02 02:02:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 88 states have internal predecessors, (104), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:02:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2023-04-02 02:02:17,557 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 29 [2023-04-02 02:02:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:02:17,557 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2023-04-02 02:02:17,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 02:02:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2023-04-02 02:02:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 02:02:17,558 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:17,558 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 02:02:17,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 02:02:17,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:17,789 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:17,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:17,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1731935178, now seen corresponding path program 1 times [2023-04-02 02:02:17,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:17,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254978924] [2023-04-02 02:02:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:17,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:17,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:02:17,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865860323] [2023-04-02 02:02:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:17,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:17,808 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) [2023-04-02 02:02:17,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 02:02:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:17,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 02:02:17,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:17,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:02:17,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:17,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254978924] [2023-04-02 02:02:17,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:02:17,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865860323] [2023-04-02 02:02:17,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865860323] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:02:17,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:02:17,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 02:02:17,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698286002] [2023-04-02 02:02:17,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:02:17,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 02:02:17,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:17,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 02:02:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 02:02:17,875 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 02:02:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:02:17,912 INFO L93 Difference]: Finished difference Result 148 states and 178 transitions. [2023-04-02 02:02:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 02:02:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-04-02 02:02:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:02:17,914 INFO L225 Difference]: With dead ends: 148 [2023-04-02 02:02:17,914 INFO L226 Difference]: Without dead ends: 95 [2023-04-02 02:02:17,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 02:02:17,918 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:02:17,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:02:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-02 02:02:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-04-02 02:02:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 74 states have internal predecessors, (87), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:02:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2023-04-02 02:02:17,945 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 35 [2023-04-02 02:02:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:02:17,946 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2023-04-02 02:02:17,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 02:02:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2023-04-02 02:02:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 02:02:17,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:02:17,951 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 02:02:17,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 02:02:18,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 02:02:18,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:02:18,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:02:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash 817777954, now seen corresponding path program 1 times [2023-04-02 02:02:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:02:18,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905387044] [2023-04-02 02:02:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:18,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:02:18,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:02:18,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306224527] [2023-04-02 02:02:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:02:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:02:18,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:02:18,181 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) [2023-04-02 02:02:18,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 02:02:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:02:18,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-02 02:02:18,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:02:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:02:18,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:03:00,217 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~b~0 2147483648)) (.cse2 (mod c_main_~A~0 4294967296)) (.cse1 (mod c_main_~r~0 4294967296))) (or (<= (* 2 .cse0) .cse1) (= .cse2 (mod (+ c_main_~r~0 (* c_main_~q~0 2 .cse0)) 4294967296)) (not (= .cse2 (mod (+ (* c_main_~b~0 c_main_~q~0 2) c_main_~r~0) 4294967296))) (< .cse1 (mod c_main_~b~0 4294967296)))) is different from true [2023-04-02 02:03:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2023-04-02 02:03:26,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:03:26,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905387044] [2023-04-02 02:03:26,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:03:26,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306224527] [2023-04-02 02:03:26,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306224527] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:03:26,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:03:26,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2023-04-02 02:03:26,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706005030] [2023-04-02 02:03:26,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:03:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 02:03:26,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:03:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 02:03:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=387, Unknown=2, NotChecked=40, Total=506 [2023-04-02 02:03:26,982 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 02:03:29,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:39,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:41,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:44,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:47,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:49,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:51,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:59,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:04:00,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:04:06,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:04:09,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:04:12,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:04:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:04:12,534 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2023-04-02 02:04:12,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 02:04:12,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2023-04-02 02:04:12,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:04:12,536 INFO L225 Difference]: With dead ends: 154 [2023-04-02 02:04:12,536 INFO L226 Difference]: Without dead ends: 113 [2023-04-02 02:04:12,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=184, Invalid=873, Unknown=3, NotChecked=62, Total=1122 [2023-04-02 02:04:12,537 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 22 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2023-04-02 02:04:12,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 282 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 282 Invalid, 6 Unknown, 76 Unchecked, 36.6s Time] [2023-04-02 02:04:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-02 02:04:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2023-04-02 02:04:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 73 states have internal predecessors, (82), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 02:04:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2023-04-02 02:04:12,548 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 38 [2023-04-02 02:04:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:04:12,549 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2023-04-02 02:04:12,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 02:04:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2023-04-02 02:04:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 02:04:12,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:04:12,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 02:04:12,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 02:04:12,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:04:12,754 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:04:12,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:04:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash 305103672, now seen corresponding path program 1 times [2023-04-02 02:04:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:04:12,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991206182] [2023-04-02 02:04:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:04:12,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:04:12,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:04:12,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671333018] [2023-04-02 02:04:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:04:12,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:04:12,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:04:12,794 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) [2023-04-02 02:04:12,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 02:04:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:04:12,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:04:12,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:04:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:04:29,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:04:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 02:04:30,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:04:30,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991206182] [2023-04-02 02:04:30,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:04:30,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671333018] [2023-04-02 02:04:30,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671333018] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:04:30,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:04:30,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-04-02 02:04:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149658225] [2023-04-02 02:04:30,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:04:30,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 02:04:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:04:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 02:04:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=116, Unknown=3, NotChecked=0, Total=156 [2023-04-02 02:04:30,965 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 02:04:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:04:31,025 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2023-04-02 02:04:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 02:04:31,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2023-04-02 02:04:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:04:31,026 INFO L225 Difference]: With dead ends: 122 [2023-04-02 02:04:31,027 INFO L226 Difference]: Without dead ends: 99 [2023-04-02 02:04:31,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=37, Invalid=116, Unknown=3, NotChecked=0, Total=156 [2023-04-02 02:04:31,027 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:04:31,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 80 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:04:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-02 02:04:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-04-02 02:04:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 76 states have (on average 1.144736842105263) internal successors, (87), 78 states have internal predecessors, (87), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 02:04:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2023-04-02 02:04:31,039 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 41 [2023-04-02 02:04:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:04:31,040 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2023-04-02 02:04:31,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 02:04:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2023-04-02 02:04:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 02:04:31,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:04:31,040 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2023-04-02 02:04:31,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 02:04:31,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 02:04:31,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:04:31,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:04:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1252707166, now seen corresponding path program 2 times [2023-04-02 02:04:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:04:31,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324712454] [2023-04-02 02:04:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:04:31,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:04:31,265 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:04:31,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880246083] [2023-04-02 02:04:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:04:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:04:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:04:31,276 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) [2023-04-02 02:04:31,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 02:04:31,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:04:31,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:04:31,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 02:04:31,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:04:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 02:04:31,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:04:35,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:04:35,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324712454] [2023-04-02 02:04:35,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:04:35,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880246083] [2023-04-02 02:04:35,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880246083] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:04:35,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:04:35,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-04-02 02:04:35,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558601209] [2023-04-02 02:04:35,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:04:35,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 02:04:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:04:35,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 02:04:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=124, Unknown=2, NotChecked=0, Total=156 [2023-04-02 02:04:35,931 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 02:04:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:04:36,404 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2023-04-02 02:04:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:04:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2023-04-02 02:04:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:04:36,405 INFO L225 Difference]: With dead ends: 113 [2023-04-02 02:04:36,405 INFO L226 Difference]: Without dead ends: 110 [2023-04-02 02:04:36,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2023-04-02 02:04:36,406 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 02:04:36,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 143 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 02:04:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-02 02:04:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2023-04-02 02:04:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 79 states have (on average 1.139240506329114) internal successors, (90), 83 states have internal predecessors, (90), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:04:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2023-04-02 02:04:36,418 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 44 [2023-04-02 02:04:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:04:36,418 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2023-04-02 02:04:36,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 02:04:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2023-04-02 02:04:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 02:04:36,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:04:36,419 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 02:04:36,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 02:04:36,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 02:04:36,624 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:04:36,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:04:36,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1471712686, now seen corresponding path program 3 times [2023-04-02 02:04:36,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:04:36,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801284237] [2023-04-02 02:04:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:04:36,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:04:36,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:04:36,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531451852] [2023-04-02 02:04:36,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:04:36,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:04:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:04:36,650 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) [2023-04-02 02:04:36,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 02:04:36,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 02:04:36,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:04:36,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 02:04:37,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:04:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 02:04:37,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:04:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 02:04:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:04:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801284237] [2023-04-02 02:04:37,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:04:37,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531451852] [2023-04-02 02:04:37,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531451852] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:04:37,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:04:37,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-04-02 02:04:37,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711364573] [2023-04-02 02:04:37,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:04:37,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:04:37,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:04:37,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:04:37,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:04:37,553 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-02 02:04:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:04:38,893 INFO L93 Difference]: Finished difference Result 131 states and 149 transitions. [2023-04-02 02:04:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:04:38,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 47 [2023-04-02 02:04:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:04:38,895 INFO L225 Difference]: With dead ends: 131 [2023-04-02 02:04:38,895 INFO L226 Difference]: Without dead ends: 90 [2023-04-02 02:04:38,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:04:38,895 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:04:38,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 194 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 02:04:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-02 02:04:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2023-04-02 02:04:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 63 states have internal predecessors, (68), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 02:04:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2023-04-02 02:04:38,905 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 47 [2023-04-02 02:04:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:04:38,906 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2023-04-02 02:04:38,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-02 02:04:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2023-04-02 02:04:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 02:04:38,906 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:04:38,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:04:38,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 02:04:39,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 02:04:39,111 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:04:39,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:04:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1047532698, now seen corresponding path program 4 times [2023-04-02 02:04:39,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:04:39,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293325680] [2023-04-02 02:04:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:04:39,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:04:39,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:04:39,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750675493] [2023-04-02 02:04:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:04:39,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:04:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:04:39,120 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) [2023-04-02 02:04:39,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 02:04:46,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:04:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:04:46,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 02:04:46,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:05:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 02:05:14,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:05:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 02:05:49,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:05:49,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293325680] [2023-04-02 02:05:49,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:05:49,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750675493] [2023-04-02 02:05:49,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750675493] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:05:49,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:05:49,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2023-04-02 02:05:49,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99764606] [2023-04-02 02:05:49,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:05:49,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 02:05:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:05:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 02:05:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=526, Unknown=9, NotChecked=0, Total=650 [2023-04-02 02:05:49,188 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9)