/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/divbin2_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:59:50,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:59:50,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:59:50,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:59:50,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:59:50,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:59:50,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:59:50,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:59:50,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:59:50,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:59:50,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:59:50,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:59:50,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:59:50,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:59:50,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:59:50,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:59:50,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:59:50,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:59:50,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:59:50,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:59:50,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:59:50,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:59:50,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:59:50,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:59:50,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:59:50,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:59:50,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:59:50,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:59:50,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:59:50,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:59:51,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:59:51,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:59:51,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:59:51,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:59:51,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:59:51,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:59:51,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:59:51,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:59:51,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:59:51,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:59:51,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:59:51,009 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 01:59:51,047 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:59:51,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:59:51,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:59:51,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:59:51,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:59:51,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:59:51,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:59:51,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:59:51,049 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:59:51,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:59:51,050 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:59:51,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:59:51,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:59:51,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:59:51,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:59:51,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:59:51,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:59:51,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:59:51,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:59:51,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:59:51,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:59:51,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:59:51,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:59:51,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:59:51,053 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:59:51,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:59:51,053 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:59:51,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:59:51,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:59:51,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:59:51,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:59:51,256 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:59:51,256 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:59:51,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2023-04-02 01:59:52,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:59:52,638 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:59:52,638 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2023-04-02 01:59:52,643 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3a267b0/7297a7fb75a447f8a68c0eed09ee0c20/FLAGd3230565c [2023-04-02 01:59:52,653 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3a267b0/7297a7fb75a447f8a68c0eed09ee0c20 [2023-04-02 01:59:52,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:59:52,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:59:52,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:59:52,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:59:52,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:59:52,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bbc3293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52, skipping insertion in model container [2023-04-02 01:59:52,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:59:52,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:59:52,798 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/divbin2_unwindbound50.i[951,964] [2023-04-02 01:59:52,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:59:52,818 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:59:52,827 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/divbin2_unwindbound50.i[951,964] [2023-04-02 01:59:52,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:59:52,842 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:59:52,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52 WrapperNode [2023-04-02 01:59:52,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:59:52,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:59:52,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:59:52,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:59:52,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,873 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:59:52,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:59:52,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:59:52,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:59:52,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (1/1) ... [2023-04-02 01:59:52,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:59:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:59:52,909 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 01:59:52,910 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 01:59:52,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:59:52,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:59:52,935 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:59:52,935 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 01:59:52,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:59:52,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 01:59:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:59:52,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:59:52,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:59:52,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:59:52,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:59:52,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:59:52,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:59:52,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:59:53,051 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:59:53,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:59:53,227 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:59:53,233 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:59:53,233 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 01:59:53,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:59:53 BoogieIcfgContainer [2023-04-02 01:59:53,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:59:53,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:59:53,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:59:53,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:59:53,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:59:52" (1/3) ... [2023-04-02 01:59:53,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5213f819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:59:53, skipping insertion in model container [2023-04-02 01:59:53,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:59:52" (2/3) ... [2023-04-02 01:59:53,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5213f819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:59:53, skipping insertion in model container [2023-04-02 01:59:53,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:59:53" (3/3) ... [2023-04-02 01:59:53,248 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound50.i [2023-04-02 01:59:53,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:59:53,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:59:53,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:59:53,323 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;@6463958f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:59:53,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:59:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 01:59:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 01:59:53,331 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:59:53,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:59:53,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:59:53,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:59:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2023-04-02 01:59:53,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:59:53,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071490134] [2023-04-02 01:59:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:53,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:59:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:53,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:59:53,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071490134] [2023-04-02 01:59:53,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 01:59:53,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579850265] [2023-04-02 01:59:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:53,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:59:53,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:59:53,504 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 01:59:53,520 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 01:59:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:53,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 01:59:53,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:59:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:53,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:59:53,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579850265] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:59:53,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:59:53,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 01:59:53,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165142942] [2023-04-02 01:59:53,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:59:53,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 01:59:53,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:59:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 01:59:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 01:59:53,653 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:59:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:59:53,672 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-04-02 01:59:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 01:59:53,674 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 01:59:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:59:53,681 INFO L225 Difference]: With dead ends: 43 [2023-04-02 01:59:53,681 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 01:59:53,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 01:59:53,689 INFO L413 NwaCegarLoop]: 31 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, 31 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 01:59:53,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:59:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 01:59:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 01:59:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:59:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-04-02 01:59:53,726 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-04-02 01:59:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:59:53,726 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-04-02 01:59:53,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:59:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-04-02 01:59:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 01:59:53,727 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:59:53,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:59:53,736 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 01:59:53,935 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 01:59:53,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:59:53,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:59:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2023-04-02 01:59:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:59:53,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414298831] [2023-04-02 01:59:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:53,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:59:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:53,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:59:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414298831] [2023-04-02 01:59:53,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 01:59:53,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562406133] [2023-04-02 01:59:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:53,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:59:53,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:59:53,982 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 01:59:53,985 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 01:59:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:54,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:59:54,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:59:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:54,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:59:54,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562406133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:59:54,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:59:54,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:59:54,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392483029] [2023-04-02 01:59:54,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:59:54,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:59:54,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:59:54,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:59:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:59:54,087 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:59:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:59:54,101 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-04-02 01:59:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:59:54,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 01:59:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:59:54,102 INFO L225 Difference]: With dead ends: 35 [2023-04-02 01:59:54,102 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 01:59:54,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 01:59:54,104 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 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 01:59:54,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:59:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 01:59:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 01:59:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:59:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-04-02 01:59:54,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2023-04-02 01:59:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:59:54,110 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-04-02 01:59:54,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:59:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-04-02 01:59:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:59:54,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:59:54,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:59:54,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:59:54,316 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 01:59:54,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:59:54,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:59:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2023-04-02 01:59:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:59:54,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609302245] [2023-04-02 01:59:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:59:54,333 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:59:54,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837887704] [2023-04-02 01:59:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:54,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:59:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:59:54,343 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 01:59:54,344 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 01:59:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:54,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:59:54,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:59:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:54,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:59:54,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:59:54,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609302245] [2023-04-02 01:59:54,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:59:54,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837887704] [2023-04-02 01:59:54,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837887704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:59:54,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:59:54,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:59:54,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238589192] [2023-04-02 01:59:54,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:59:54,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:59:54,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:59:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:59:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:59:54,466 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:59:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:59:54,490 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-04-02 01:59:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:59:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 01:59:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:59:54,494 INFO L225 Difference]: With dead ends: 34 [2023-04-02 01:59:54,494 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 01:59:54,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 01:59:54,497 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:59:54,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:59:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 01:59:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-04-02 01:59:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:59:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-04-02 01:59:54,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2023-04-02 01:59:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:59:54,506 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-04-02 01:59:54,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:59:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-04-02 01:59:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:59:54,507 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:59:54,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:59:54,517 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 01:59:54,715 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 01:59:54,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:59:54,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:59:54,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 1 times [2023-04-02 01:59:54,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:59:54,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577991058] [2023-04-02 01:59:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:54,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:59:54,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:59:54,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923383137] [2023-04-02 01:59:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:59:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:59:54,747 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 01:59:54,751 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 01:59:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:54,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 01:59:54,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:59:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:54,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:59:54,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:59:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577991058] [2023-04-02 01:59:54,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:59:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923383137] [2023-04-02 01:59:54,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923383137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:59:54,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:59:54,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:59:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039246803] [2023-04-02 01:59:54,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:59:54,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:59:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:59:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:59:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:59:54,980 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:59:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:59:55,043 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2023-04-02 01:59:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:59:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 01:59:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:59:55,044 INFO L225 Difference]: With dead ends: 35 [2023-04-02 01:59:55,044 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 01:59:55,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:59:55,046 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:59:55,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 85 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:59:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 01:59:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 01:59:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:59:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-04-02 01:59:55,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2023-04-02 01:59:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:59:55,053 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-04-02 01:59:55,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:59:55,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-04-02 01:59:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 01:59:55,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:59:55,054 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:59:55,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:59:55,254 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 01:59:55,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:59:55,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:59:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2023-04-02 01:59:55,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:59:55,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542965268] [2023-04-02 01:59:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:55,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:59:55,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:59:55,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243162080] [2023-04-02 01:59:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:55,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:59:55,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:59:55,276 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 01:59:55,278 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 01:59:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:55,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:59:55,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:59:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:55,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:59:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:55,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:59:55,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542965268] [2023-04-02 01:59:55,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:59:55,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243162080] [2023-04-02 01:59:55,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243162080] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:59:55,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:59:55,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 01:59:55,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733973073] [2023-04-02 01:59:55,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:59:55,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:59:55,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:59:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:59:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:59:55,439 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:59:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:59:55,504 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2023-04-02 01:59:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 01:59:55,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-02 01:59:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:59:55,508 INFO L225 Difference]: With dead ends: 66 [2023-04-02 01:59:55,508 INFO L226 Difference]: Without dead ends: 54 [2023-04-02 01:59:55,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 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 01:59:55,509 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:59:55,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 115 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:59:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-02 01:59:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2023-04-02 01:59:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:59:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-04-02 01:59:55,517 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 17 [2023-04-02 01:59:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:59:55,517 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-04-02 01:59:55,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:59:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-04-02 01:59:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 01:59:55,518 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:59:55,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:59:55,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 01:59:55,718 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 01:59:55,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:59:55,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:59:55,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1615882355, now seen corresponding path program 1 times [2023-04-02 01:59:55,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:59:55,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143873621] [2023-04-02 01:59:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:59:55,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:59:55,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535059602] [2023-04-02 01:59:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:55,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:59:55,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:59:55,741 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 01:59:55,744 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 01:59:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:55,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 01:59:55,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:59:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:55,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:59:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:55,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:59:55,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143873621] [2023-04-02 01:59:55,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:59:55,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535059602] [2023-04-02 01:59:55,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535059602] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:59:55,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:59:55,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-02 01:59:55,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123747901] [2023-04-02 01:59:55,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:59:55,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 01:59:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:59:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 01:59:55,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:59:55,914 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:59:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:59:56,009 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2023-04-02 01:59:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:59:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 01:59:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:59:56,013 INFO L225 Difference]: With dead ends: 91 [2023-04-02 01:59:56,013 INFO L226 Difference]: Without dead ends: 84 [2023-04-02 01:59:56,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:59:56,015 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:59:56,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 142 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:59:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-02 01:59:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2023-04-02 01:59:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 63 states have internal predecessors, (81), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 01:59:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2023-04-02 01:59:56,041 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 18 [2023-04-02 01:59:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:59:56,041 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2023-04-02 01:59:56,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:59:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2023-04-02 01:59:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 01:59:56,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:59:56,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:59:56,061 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 01:59:56,261 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 01:59:56,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:59:56,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:59:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1617669815, now seen corresponding path program 1 times [2023-04-02 01:59:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:59:56,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90320592] [2023-04-02 01:59:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:59:56,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:59:56,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083253834] [2023-04-02 01:59:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:59:56,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:59:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:59:56,274 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 01:59:56,292 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 01:59:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:59:56,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 01:59:56,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:59:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:56,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:59:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:59:56,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:59:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90320592] [2023-04-02 01:59:56,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:59:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083253834] [2023-04-02 01:59:56,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083253834] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:59:56,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:59:56,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 01:59:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801013135] [2023-04-02 01:59:56,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:59:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:59:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:59:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:59:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:59:56,887 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:00:00,153 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 02:00:02,161 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 [] [2023-04-02 02:00:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:03,724 INFO L93 Difference]: Finished difference Result 140 states and 181 transitions. [2023-04-02 02:00:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:00:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-02 02:00:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:03,725 INFO L225 Difference]: With dead ends: 140 [2023-04-02 02:00:03,725 INFO L226 Difference]: Without dead ends: 132 [2023-04-02 02:00:03,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:00:03,727 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:03,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 126 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 120 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2023-04-02 02:00:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-02 02:00:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2023-04-02 02:00:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 89 states have internal predecessors, (109), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 02:00:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2023-04-02 02:00:03,749 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 18 [2023-04-02 02:00:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:03,750 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2023-04-02 02:00:03,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:00:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2023-04-02 02:00:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 02:00:03,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:03,751 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] [2023-04-02 02:00:03,763 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 02:00:03,957 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 02:00:03,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:03,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 1 times [2023-04-02 02:00:03,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:03,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155416865] [2023-04-02 02:00:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:03,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:03,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:03,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639565140] [2023-04-02 02:00:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:03,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:03,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:03,974 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 02:00:03,976 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 02:00:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:00:04,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:00:04,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:00:04,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:00:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:00:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155416865] [2023-04-02 02:00:04,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:00:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639565140] [2023-04-02 02:00:04,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639565140] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:00:04,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:00:04,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 02:00:04,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201225963] [2023-04-02 02:00:04,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:00:04,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 02:00:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:00:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 02:00:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 02:00:04,087 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:00:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:04,111 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2023-04-02 02:00:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 02:00:04,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-04-02 02:00:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:04,112 INFO L225 Difference]: With dead ends: 140 [2023-04-02 02:00:04,112 INFO L226 Difference]: Without dead ends: 79 [2023-04-02 02:00:04,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 02:00:04,116 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:04,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:00:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-02 02:00:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-02 02:00:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 64 states have internal predecessors, (79), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 02:00:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2023-04-02 02:00:04,129 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 24 [2023-04-02 02:00:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:04,129 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2023-04-02 02:00:04,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:00:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2023-04-02 02:00:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 02:00:04,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:04,130 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:00:04,138 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 02:00:04,335 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 02:00:04,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:04,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1554339292, now seen corresponding path program 1 times [2023-04-02 02:00:04,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:04,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90320243] [2023-04-02 02:00:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:04,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:04,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524798687] [2023-04-02 02:00:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:04,358 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 02:00:04,368 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 02:00:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:00:04,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 02:00:04,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:00:04,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:00:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:00:04,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:00:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90320243] [2023-04-02 02:00:04,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:00:04,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524798687] [2023-04-02 02:00:04,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524798687] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:00:04,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:00:04,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 02:00:04,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247720848] [2023-04-02 02:00:04,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:00:04,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 02:00:04,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:00:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 02:00:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:00:04,541 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:00:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:04,690 INFO L93 Difference]: Finished difference Result 156 states and 195 transitions. [2023-04-02 02:00:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 02:00:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-04-02 02:00:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:04,691 INFO L225 Difference]: With dead ends: 156 [2023-04-02 02:00:04,691 INFO L226 Difference]: Without dead ends: 142 [2023-04-02 02:00:04,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-04-02 02:00:04,692 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:04,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 172 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:00:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-02 02:00:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2023-04-02 02:00:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.263157894736842) internal successors, (96), 78 states have internal predecessors, (96), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 02:00:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2023-04-02 02:00:04,705 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 26 [2023-04-02 02:00:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:04,705 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2023-04-02 02:00:04,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 02:00:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2023-04-02 02:00:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 02:00:04,706 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:04,706 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:00:04,712 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 02:00:04,912 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 02:00:04,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:04,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash 557788470, now seen corresponding path program 2 times [2023-04-02 02:00:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:04,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598993073] [2023-04-02 02:00:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:04,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:04,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195144992] [2023-04-02 02:00:04,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:00:04,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:04,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:04,926 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 02:00:04,930 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 02:00:04,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-02 02:00:04,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:00:04,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 02:00:04,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 02:00:05,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:00:05,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:00:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598993073] [2023-04-02 02:00:05,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:00:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195144992] [2023-04-02 02:00:05,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195144992] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:00:05,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:00:05,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 02:00:05,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342481641] [2023-04-02 02:00:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:00:05,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:00:05,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:00:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:00:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 02:00:05,068 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:00:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:05,380 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2023-04-02 02:00:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:00:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-02 02:00:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:05,381 INFO L225 Difference]: With dead ends: 131 [2023-04-02 02:00:05,382 INFO L226 Difference]: Without dead ends: 126 [2023-04-02 02:00:05,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:00:05,382 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:05,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 78 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 02:00:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-02 02:00:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2023-04-02 02:00:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 89 states have internal predecessors, (109), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:00:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2023-04-02 02:00:05,397 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 27 [2023-04-02 02:00:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:05,397 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2023-04-02 02:00:05,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 02:00:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2023-04-02 02:00:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 02:00:05,399 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:05,399 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:00:05,405 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 02:00:05,604 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 02:00:05,604 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:05,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:05,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1082249335, now seen corresponding path program 1 times [2023-04-02 02:00:05,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:05,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571258314] [2023-04-02 02:00:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:05,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:05,614 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:05,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755531412] [2023-04-02 02:00:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:05,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:05,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:05,616 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 02:00:05,618 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 02:00:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:00:05,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 02:00:05,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:00:05,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:00:08,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:00:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571258314] [2023-04-02 02:00:08,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:00:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755531412] [2023-04-02 02:00:08,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755531412] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:00:08,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:00:08,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-02 02:00:08,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755532009] [2023-04-02 02:00:08,311 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:00:08,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 02:00:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:00:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 02:00:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2023-04-02 02:00:08,312 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:00:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:09,658 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2023-04-02 02:00:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 02:00:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-04-02 02:00:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:09,660 INFO L225 Difference]: With dead ends: 185 [2023-04-02 02:00:09,660 INFO L226 Difference]: Without dead ends: 132 [2023-04-02 02:00:09,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=68, Invalid=237, Unknown=1, NotChecked=0, Total=306 [2023-04-02 02:00:09,661 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:09,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 170 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 02:00:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-02 02:00:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-04-02 02:00:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 108 states have internal predecessors, (127), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 02:00:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2023-04-02 02:00:09,679 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 30 [2023-04-02 02:00:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:09,680 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2023-04-02 02:00:09,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:00:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2023-04-02 02:00:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 02:00:09,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:09,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:00:09,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-02 02:00:09,888 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 02:00:09,888 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:09,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2030398442, now seen corresponding path program 2 times [2023-04-02 02:00:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:09,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687240477] [2023-04-02 02:00:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:09,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:09,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:09,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65118167] [2023-04-02 02:00:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:00:09,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:09,930 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 02:00:09,943 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 02:00:10,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:00:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:00:10,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 02:00:10,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:00:10,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:00:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:00:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687240477] [2023-04-02 02:00:12,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:00:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65118167] [2023-04-02 02:00:12,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65118167] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:00:12,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:00:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-02 02:00:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184594569] [2023-04-02 02:00:12,599 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:00:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 02:00:12,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:00:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 02:00:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2023-04-02 02:00:12,600 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:00:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:14,257 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2023-04-02 02:00:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 02:00:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-04-02 02:00:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:14,259 INFO L225 Difference]: With dead ends: 168 [2023-04-02 02:00:14,259 INFO L226 Difference]: Without dead ends: 165 [2023-04-02 02:00:14,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2023-04-02 02:00:14,260 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:14,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 245 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 02:00:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-04-02 02:00:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2023-04-02 02:00:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 108 states have internal predecessors, (127), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 02:00:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2023-04-02 02:00:14,276 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 33 [2023-04-02 02:00:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:14,277 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2023-04-02 02:00:14,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:00:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2023-04-02 02:00:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 02:00:14,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:14,280 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:00:14,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-02 02:00:14,489 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 02:00:14,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:14,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:14,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1417698711, now seen corresponding path program 3 times [2023-04-02 02:00:14,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:14,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907661076] [2023-04-02 02:00:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:14,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:14,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:14,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877033353] [2023-04-02 02:00:14,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:00:14,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:14,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:14,503 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 02:00:14,507 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 02:00:23,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 02:00:23,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:00:23,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 02:00:23,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:00:23,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:00:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 02:00:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:00:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907661076] [2023-04-02 02:00:23,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:00:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877033353] [2023-04-02 02:00:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877033353] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:00:23,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:00:23,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-04-02 02:00:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549403877] [2023-04-02 02:00:23,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:00:23,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 02:00:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:00:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 02:00:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:00:23,600 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 02:00:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:23,854 INFO L93 Difference]: Finished difference Result 159 states and 187 transitions. [2023-04-02 02:00:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 02:00:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2023-04-02 02:00:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:23,855 INFO L225 Difference]: With dead ends: 159 [2023-04-02 02:00:23,855 INFO L226 Difference]: Without dead ends: 117 [2023-04-02 02:00:23,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:00:23,856 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:23,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 122 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:00:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-02 02:00:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2023-04-02 02:00:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.197674418604651) internal successors, (103), 87 states have internal predecessors, (103), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 02:00:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2023-04-02 02:00:23,872 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 36 [2023-04-02 02:00:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:23,872 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2023-04-02 02:00:23,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 02:00:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2023-04-02 02:00:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 02:00:23,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:23,874 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:00:23,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 02:00:24,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 02:00:24,083 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:24,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1716777427, now seen corresponding path program 1 times [2023-04-02 02:00:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:24,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012743945] [2023-04-02 02:00:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:24,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:24,097 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:24,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242497080] [2023-04-02 02:00:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:24,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:24,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:24,100 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:00:24,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 02:00:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:00:24,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:00:24,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:00:24,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:00:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 02:00:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:00:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012743945] [2023-04-02 02:00:24,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:00:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242497080] [2023-04-02 02:00:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242497080] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:00:24,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:00:24,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-04-02 02:00:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050801699] [2023-04-02 02:00:24,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:00:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 02:00:24,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:00:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 02:00:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:00:24,385 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 02:00:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:24,628 INFO L93 Difference]: Finished difference Result 442 states and 505 transitions. [2023-04-02 02:00:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 02:00:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2023-04-02 02:00:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:24,633 INFO L225 Difference]: With dead ends: 442 [2023-04-02 02:00:24,633 INFO L226 Difference]: Without dead ends: 435 [2023-04-02 02:00:24,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-04-02 02:00:24,634 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 216 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:24,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 263 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:00:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-04-02 02:00:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 400. [2023-04-02 02:00:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 309 states have (on average 1.2006472491909386) internal successors, (371), 318 states have internal predecessors, (371), 50 states have call successors, (50), 41 states have call predecessors, (50), 40 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-04-02 02:00:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 461 transitions. [2023-04-02 02:00:24,681 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 461 transitions. Word has length 36 [2023-04-02 02:00:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:24,682 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 461 transitions. [2023-04-02 02:00:24,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 02:00:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 461 transitions. [2023-04-02 02:00:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 02:00:24,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:24,683 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:00:24,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 02:00:24,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:24,888 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:24,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1718564887, now seen corresponding path program 4 times [2023-04-02 02:00:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:24,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002616454] [2023-04-02 02:00:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:24,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:24,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128906168] [2023-04-02 02:00:24,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:00:24,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:24,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:24,900 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:00:24,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 02:00:25,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:00:25,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:00:25,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 02:00:25,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 02:00:25,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:00:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:00:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002616454] [2023-04-02 02:00:28,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:00:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128906168] [2023-04-02 02:00:28,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128906168] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:00:28,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:00:28,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-04-02 02:00:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307893768] [2023-04-02 02:00:28,078 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:00:28,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 02:00:28,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:00:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 02:00:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-02 02:00:28,079 INFO L87 Difference]: Start difference. First operand 400 states and 461 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:00:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:00:28,673 INFO L93 Difference]: Finished difference Result 476 states and 553 transitions. [2023-04-02 02:00:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:00:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-04-02 02:00:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:00:28,677 INFO L225 Difference]: With dead ends: 476 [2023-04-02 02:00:28,677 INFO L226 Difference]: Without dead ends: 466 [2023-04-02 02:00:28,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:00:28,679 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 02:00:28,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 02:00:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-04-02 02:00:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 316. [2023-04-02 02:00:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 243 states have (on average 1.2098765432098766) internal successors, (294), 252 states have internal predecessors, (294), 41 states have call successors, (41), 32 states have call predecessors, (41), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-02 02:00:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 366 transitions. [2023-04-02 02:00:28,718 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 366 transitions. Word has length 36 [2023-04-02 02:00:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:00:28,718 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 366 transitions. [2023-04-02 02:00:28,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 02:00:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 366 transitions. [2023-04-02 02:00:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 02:00:28,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:00:28,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:00:28,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 02:00:28,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 02:00:28,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:00:28,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:00:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 454667766, now seen corresponding path program 5 times [2023-04-02 02:00:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:00:28,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813799017] [2023-04-02 02:00:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:00:28,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:00:28,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:00:28,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176869483] [2023-04-02 02:00:28,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 02:00:28,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:00:28,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:00:28,935 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:00:28,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 02:00:29,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-04-02 02:00:29,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:00:29,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-02 02:00:29,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:00:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:00:29,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:01:24,827 WARN L223 SmtUtils]: Spent 5.74s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:02:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 02:02:10,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:02:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813799017] [2023-04-02 02:02:10,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:02:10,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176869483] [2023-04-02 02:02:10,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176869483] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:02:10,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:02:10,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2023-04-02 02:02:10,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472538318] [2023-04-02 02:02:10,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:02:10,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 02:02:10,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:02:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 02:02:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=400, Unknown=4, NotChecked=0, Total=506 [2023-04-02 02:02:10,506 INFO L87 Difference]: Start difference. First operand 316 states and 366 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 21 states have internal predecessors, (55), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 02:03:42,583 WARN L223 SmtUtils]: Spent 1.52m on a formula simplification. DAG size of input: 65 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:03:44,663 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 02:03:47,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:49,447 WARN L539 Checker$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 02:03:51,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:03:53,950 WARN L539 Checker$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 02:04:10,946 WARN L223 SmtUtils]: Spent 10.92s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:04:12,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:04:19,813 WARN L539 Checker$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 02:04:22,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:04:24,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []