./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 23:57:27,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 23:57:27,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 23:57:27,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 23:57:27,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 23:57:27,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 23:57:27,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 23:57:27,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 23:57:27,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 23:57:27,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 23:57:27,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 23:57:27,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 23:57:27,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 23:57:27,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 23:57:27,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 23:57:27,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 23:57:27,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 23:57:27,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 23:57:27,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 23:57:27,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 23:57:27,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 23:57:27,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 23:57:27,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 23:57:28,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 23:57:28,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 23:57:28,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 23:57:28,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 23:57:28,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 23:57:28,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 23:57:28,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 23:57:28,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 23:57:28,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 23:57:28,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 23:57:28,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 23:57:28,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 23:57:28,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 23:57:28,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 23:57:28,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 23:57:28,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 23:57:28,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 23:57:28,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 23:57:28,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 23:57:28,036 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 23:57:28,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 23:57:28,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 23:57:28,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 23:57:28,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 23:57:28,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 23:57:28,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 23:57:28,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 23:57:28,039 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 23:57:28,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 23:57:28,039 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 23:57:28,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 23:57:28,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 23:57:28,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 23:57:28,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 23:57:28,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 23:57:28,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 23:57:28,040 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 23:57:28,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 23:57:28,041 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 23:57:28,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 23:57:28,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 23:57:28,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 23:57:28,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 23:57:28,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:57:28,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 23:57:28,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 23:57:28,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 23:57:28,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 23:57:28,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 23:57:28,042 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 23:57:28,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 23:57:28,043 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 23:57:28,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 23:57:28,043 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 23:57:28,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2023-02-14 23:57:28,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 23:57:28,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 23:57:28,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 23:57:28,273 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 23:57:28,274 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 23:57:28,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2023-02-14 23:57:29,272 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 23:57:29,386 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 23:57:29,386 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2023-02-14 23:57:29,390 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b6b997b/b9ebb8ae75e84b509ddfc656f52de2c2/FLAGaeb47ca0f [2023-02-14 23:57:29,399 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9b6b997b/b9ebb8ae75e84b509ddfc656f52de2c2 [2023-02-14 23:57:29,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 23:57:29,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 23:57:29,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 23:57:29,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 23:57:29,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 23:57:29,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f4b547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29, skipping insertion in model container [2023-02-14 23:57:29,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 23:57:29,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 23:57:29,558 WARN L237 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/fermat1-ll_unwindbound50.c[535,548] [2023-02-14 23:57:29,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:57:29,576 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 23:57:29,583 WARN L237 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/fermat1-ll_unwindbound50.c[535,548] [2023-02-14 23:57:29,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:57:29,597 INFO L208 MainTranslator]: Completed translation [2023-02-14 23:57:29,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29 WrapperNode [2023-02-14 23:57:29,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 23:57:29,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 23:57:29,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 23:57:29,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 23:57:29,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,629 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-14 23:57:29,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 23:57:29,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 23:57:29,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 23:57:29,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 23:57:29,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,642 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 23:57:29,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 23:57:29,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 23:57:29,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 23:57:29,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (1/1) ... [2023-02-14 23:57:29,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:57:29,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:29,676 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) [2023-02-14 23:57:29,684 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 [2023-02-14 23:57:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 23:57:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 23:57:29,705 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 23:57:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 23:57:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 23:57:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 23:57:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 23:57:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 23:57:29,752 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 23:57:29,753 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 23:57:29,925 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 23:57:29,929 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 23:57:29,937 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 23:57:29,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:57:29 BoogieIcfgContainer [2023-02-14 23:57:29,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 23:57:29,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 23:57:29,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 23:57:29,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 23:57:29,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:57:29" (1/3) ... [2023-02-14 23:57:29,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f4e314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:57:29, skipping insertion in model container [2023-02-14 23:57:29,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:57:29" (2/3) ... [2023-02-14 23:57:29,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f4e314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:57:29, skipping insertion in model container [2023-02-14 23:57:29,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:57:29" (3/3) ... [2023-02-14 23:57:29,960 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2023-02-14 23:57:29,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 23:57:29,985 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 23:57:30,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 23:57:30,024 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;@7b3d9462, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 23:57:30,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 23:57:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 23:57:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 23:57:30,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:30,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:30,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2023-02-14 23:57:30,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:30,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462024157] [2023-02-14 23:57:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:30,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:30,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:30,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509353021] [2023-02-14 23:57:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:30,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:30,131 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) [2023-02-14 23:57:30,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 23:57:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 23:57:30,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:57:30,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:30,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:30,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462024157] [2023-02-14 23:57:30,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:30,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509353021] [2023-02-14 23:57:30,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509353021] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:30,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:30,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 23:57:30,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634983246] [2023-02-14 23:57:30,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:30,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 23:57:30,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 23:57:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:57:30,218 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 23:57:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:30,232 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2023-02-14 23:57:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 23:57:30,233 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-14 23:57:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:30,237 INFO L225 Difference]: With dead ends: 61 [2023-02-14 23:57:30,237 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 23:57:30,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:57:30,241 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2023-02-14 23:57:30,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 23:57:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-14 23:57:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 23:57:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-14 23:57:30,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2023-02-14 23:57:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:30,264 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-14 23:57:30,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 23:57:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-14 23:57:30,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 23:57:30,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:30,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:30,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 23:57:30,470 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 [2023-02-14 23:57:30,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2023-02-14 23:57:30,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:30,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933295932] [2023-02-14 23:57:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:30,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:30,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:30,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758833609] [2023-02-14 23:57:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:30,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:30,482 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) [2023-02-14 23:57:30,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 23:57:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:30,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 23:57:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:30,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:30,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:30,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933295932] [2023-02-14 23:57:30,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:30,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758833609] [2023-02-14 23:57:30,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758833609] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:30,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:30,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 23:57:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748751360] [2023-02-14 23:57:30,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:57:30,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:57:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:57:30,596 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 23:57:30,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:30,620 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-02-14 23:57:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:57:30,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-14 23:57:30,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:30,622 INFO L225 Difference]: With dead ends: 37 [2023-02-14 23:57:30,622 INFO L226 Difference]: Without dead ends: 30 [2023-02-14 23:57:30,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:57:30,623 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 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 [2023-02-14 23:57:30,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-14 23:57:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-14 23:57:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 23:57:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-14 23:57:30,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2023-02-14 23:57:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:30,629 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-14 23:57:30,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 23:57:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-14 23:57:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 23:57:30,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:30,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:30,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:30,836 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 [2023-02-14 23:57:30,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2023-02-14 23:57:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:30,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396087325] [2023-02-14 23:57:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:30,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:30,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382349792] [2023-02-14 23:57:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:30,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:30,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:30,847 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) [2023-02-14 23:57:30,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 23:57:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 23:57:30,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 23:57:31,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:31,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396087325] [2023-02-14 23:57:31,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382349792] [2023-02-14 23:57:31,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382349792] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:31,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:31,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 23:57:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112772602] [2023-02-14 23:57:31,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 23:57:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 23:57:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-14 23:57:31,033 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 23:57:33,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:57:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:34,400 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-02-14 23:57:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 23:57:34,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-14 23:57:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:34,401 INFO L225 Difference]: With dead ends: 49 [2023-02-14 23:57:34,401 INFO L226 Difference]: Without dead ends: 47 [2023-02-14 23:57:34,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:57:34,411 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:34,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 122 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-02-14 23:57:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-14 23:57:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-14 23:57:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 23:57:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2023-02-14 23:57:34,423 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2023-02-14 23:57:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:34,423 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2023-02-14 23:57:34,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 23:57:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2023-02-14 23:57:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 23:57:34,424 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:34,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:34,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:34,628 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 [2023-02-14 23:57:34,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:34,629 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2023-02-14 23:57:34,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:34,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680683747] [2023-02-14 23:57:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:34,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:34,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374758501] [2023-02-14 23:57:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:34,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:34,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:34,661 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) [2023-02-14 23:57:34,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 23:57:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:34,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 23:57:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:34,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:34,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680683747] [2023-02-14 23:57:34,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:34,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374758501] [2023-02-14 23:57:34,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374758501] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:34,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:34,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-14 23:57:34,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749933529] [2023-02-14 23:57:34,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:34,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 23:57:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 23:57:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-14 23:57:34,853 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 23:57:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:35,002 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-02-14 23:57:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 23:57:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-02-14 23:57:35,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:35,003 INFO L225 Difference]: With dead ends: 53 [2023-02-14 23:57:35,003 INFO L226 Difference]: Without dead ends: 48 [2023-02-14 23:57:35,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:57:35,004 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:35,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:57:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-14 23:57:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2023-02-14 23:57:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 23:57:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-02-14 23:57:35,014 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2023-02-14 23:57:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:35,015 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-02-14 23:57:35,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 23:57:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-02-14 23:57:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 23:57:35,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:35,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:35,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 23:57:35,219 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 [2023-02-14 23:57:35,220 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2023-02-14 23:57:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:35,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447150728] [2023-02-14 23:57:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:35,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:35,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:35,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130056627] [2023-02-14 23:57:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:35,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:35,243 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) [2023-02-14 23:57:35,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 23:57:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:35,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 23:57:35,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:35,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:35,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:35,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447150728] [2023-02-14 23:57:35,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:35,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130056627] [2023-02-14 23:57:35,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130056627] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:35,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:35,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 23:57:35,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678707574] [2023-02-14 23:57:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:35,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:57:35,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:57:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:57:35,307 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 23:57:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:35,327 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-02-14 23:57:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 23:57:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-14 23:57:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:35,328 INFO L225 Difference]: With dead ends: 61 [2023-02-14 23:57:35,328 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 23:57:35,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:57:35,329 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:35,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 23:57:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-02-14 23:57:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 23:57:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-14 23:57:35,339 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2023-02-14 23:57:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:35,339 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-14 23:57:35,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 23:57:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-14 23:57:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 23:57:35,340 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:35,340 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:35,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:35,547 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 [2023-02-14 23:57:35,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:35,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2023-02-14 23:57:35,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:35,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851152594] [2023-02-14 23:57:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:35,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:35,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:35,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322379020] [2023-02-14 23:57:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:35,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:35,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:35,557 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) [2023-02-14 23:57:35,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 23:57:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 23:57:35,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:35,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 23:57:35,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851152594] [2023-02-14 23:57:35,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322379020] [2023-02-14 23:57:35,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322379020] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:57:35,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:57:35,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-02-14 23:57:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282110527] [2023-02-14 23:57:35,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:35,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 23:57:35,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 23:57:35,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:57:35,687 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 23:57:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:35,719 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2023-02-14 23:57:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:57:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-02-14 23:57:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:35,723 INFO L225 Difference]: With dead ends: 70 [2023-02-14 23:57:35,723 INFO L226 Difference]: Without dead ends: 49 [2023-02-14 23:57:35,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:57:35,725 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:35,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-14 23:57:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-02-14 23:57:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 23:57:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-02-14 23:57:35,766 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2023-02-14 23:57:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:35,768 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-02-14 23:57:35,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 23:57:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-02-14 23:57:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 23:57:35,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:35,773 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:35,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:35,978 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 [2023-02-14 23:57:35,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2023-02-14 23:57:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:35,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391421469] [2023-02-14 23:57:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:35,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:35,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:35,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712746191] [2023-02-14 23:57:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:35,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:35,988 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) [2023-02-14 23:57:36,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 23:57:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:36,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 23:57:36,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:36,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 23:57:36,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:36,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391421469] [2023-02-14 23:57:36,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:36,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712746191] [2023-02-14 23:57:36,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712746191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:36,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:36,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-14 23:57:36,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378725508] [2023-02-14 23:57:36,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 23:57:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 23:57:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:57:36,122 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-14 23:57:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:36,226 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2023-02-14 23:57:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 23:57:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2023-02-14 23:57:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:36,227 INFO L225 Difference]: With dead ends: 125 [2023-02-14 23:57:36,227 INFO L226 Difference]: Without dead ends: 104 [2023-02-14 23:57:36,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:57:36,228 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 62 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:36,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 215 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:57:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-14 23:57:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2023-02-14 23:57:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-14 23:57:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-02-14 23:57:36,248 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2023-02-14 23:57:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:36,248 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-02-14 23:57:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-14 23:57:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-02-14 23:57:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 23:57:36,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:36,249 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:36,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 23:57:36,453 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 [2023-02-14 23:57:36,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:36,454 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2023-02-14 23:57:36,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:36,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077440184] [2023-02-14 23:57:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:36,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:36,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:36,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448117199] [2023-02-14 23:57:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:36,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:36,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:36,462 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) [2023-02-14 23:57:36,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 23:57:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 23:57:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 23:57:36,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:36,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:36,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077440184] [2023-02-14 23:57:36,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:36,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448117199] [2023-02-14 23:57:36,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448117199] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:36,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:36,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 23:57:36,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157343159] [2023-02-14 23:57:36,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:36,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:57:36,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:57:36,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:57:36,538 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 23:57:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:36,598 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2023-02-14 23:57:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:57:36,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2023-02-14 23:57:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:36,600 INFO L225 Difference]: With dead ends: 154 [2023-02-14 23:57:36,600 INFO L226 Difference]: Without dead ends: 115 [2023-02-14 23:57:36,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:57:36,601 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:36,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 109 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-14 23:57:36,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2023-02-14 23:57:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-14 23:57:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2023-02-14 23:57:36,625 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2023-02-14 23:57:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:36,625 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2023-02-14 23:57:36,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 23:57:36,626 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2023-02-14 23:57:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 23:57:36,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:36,626 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:36,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 23:57:36,831 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 [2023-02-14 23:57:36,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:36,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2023-02-14 23:57:36,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:36,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523463243] [2023-02-14 23:57:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:36,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:36,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:36,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748724922] [2023-02-14 23:57:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:36,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:36,839 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) [2023-02-14 23:57:36,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 23:57:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 23:57:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:36,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 23:57:37,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:37,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523463243] [2023-02-14 23:57:37,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:37,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748724922] [2023-02-14 23:57:37,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748724922] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:37,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:37,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-02-14 23:57:37,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683851807] [2023-02-14 23:57:37,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:37,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 23:57:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 23:57:37,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-02-14 23:57:37,008 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-14 23:57:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:37,147 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2023-02-14 23:57:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 23:57:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2023-02-14 23:57:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:37,148 INFO L225 Difference]: With dead ends: 215 [2023-02-14 23:57:37,149 INFO L226 Difference]: Without dead ends: 168 [2023-02-14 23:57:37,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-02-14 23:57:37,149 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 107 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:37,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 234 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:57:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-14 23:57:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2023-02-14 23:57:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-14 23:57:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2023-02-14 23:57:37,177 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2023-02-14 23:57:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:37,178 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2023-02-14 23:57:37,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-14 23:57:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2023-02-14 23:57:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 23:57:37,178 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:37,178 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:37,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 23:57:37,383 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 [2023-02-14 23:57:37,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2023-02-14 23:57:37,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:37,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734217996] [2023-02-14 23:57:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:37,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:37,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:37,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840186938] [2023-02-14 23:57:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:37,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:37,392 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) [2023-02-14 23:57:37,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 23:57:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 23:57:37,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:37,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 23:57:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734217996] [2023-02-14 23:57:37,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840186938] [2023-02-14 23:57:37,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840186938] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:37,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:37,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-14 23:57:37,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724751044] [2023-02-14 23:57:37,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:37,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 23:57:37,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 23:57:37,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:57:37,563 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-14 23:57:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:37,764 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2023-02-14 23:57:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 23:57:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2023-02-14 23:57:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:37,766 INFO L225 Difference]: With dead ends: 207 [2023-02-14 23:57:37,766 INFO L226 Difference]: Without dead ends: 202 [2023-02-14 23:57:37,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-02-14 23:57:37,767 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 130 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:37,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 234 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:57:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-14 23:57:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2023-02-14 23:57:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-14 23:57:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2023-02-14 23:57:37,800 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2023-02-14 23:57:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:37,800 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2023-02-14 23:57:37,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-02-14 23:57:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2023-02-14 23:57:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 23:57:37,802 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:37,802 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:37,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:38,006 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 [2023-02-14 23:57:38,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2023-02-14 23:57:38,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:38,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237302019] [2023-02-14 23:57:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:38,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:38,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:38,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731219394] [2023-02-14 23:57:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:38,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:38,015 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) [2023-02-14 23:57:38,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 23:57:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:38,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 23:57:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-14 23:57:38,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-02-14 23:57:38,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237302019] [2023-02-14 23:57:38,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731219394] [2023-02-14 23:57:38,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731219394] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:38,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:38,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2023-02-14 23:57:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162132786] [2023-02-14 23:57:38,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:38,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:57:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:57:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:57:38,143 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-14 23:57:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:38,263 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2023-02-14 23:57:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 23:57:38,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-02-14 23:57:38,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:38,265 INFO L225 Difference]: With dead ends: 498 [2023-02-14 23:57:38,265 INFO L226 Difference]: Without dead ends: 355 [2023-02-14 23:57:38,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:57:38,266 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:38,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-14 23:57:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2023-02-14 23:57:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2023-02-14 23:57:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2023-02-14 23:57:38,339 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2023-02-14 23:57:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:38,339 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2023-02-14 23:57:38,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-14 23:57:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2023-02-14 23:57:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 23:57:38,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:38,341 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:38,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 23:57:38,545 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 [2023-02-14 23:57:38,545 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2023-02-14 23:57:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:38,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597224366] [2023-02-14 23:57:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:38,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:38,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874795215] [2023-02-14 23:57:38,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:57:38,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:38,553 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) [2023-02-14 23:57:38,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 23:57:38,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:57:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:38,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 23:57:38,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 23:57:38,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-14 23:57:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:38,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597224366] [2023-02-14 23:57:38,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:38,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874795215] [2023-02-14 23:57:38,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874795215] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:38,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:38,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-02-14 23:57:38,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405570520] [2023-02-14 23:57:38,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:38,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 23:57:38,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:38,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 23:57:38,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2023-02-14 23:57:38,868 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-14 23:57:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:39,306 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2023-02-14 23:57:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-14 23:57:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2023-02-14 23:57:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:39,312 INFO L225 Difference]: With dead ends: 981 [2023-02-14 23:57:39,312 INFO L226 Difference]: Without dead ends: 838 [2023-02-14 23:57:39,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 23:57:39,313 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 250 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:39,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 361 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:57:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-02-14 23:57:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2023-02-14 23:57:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2023-02-14 23:57:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2023-02-14 23:57:39,481 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2023-02-14 23:57:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:39,482 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2023-02-14 23:57:39,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-14 23:57:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2023-02-14 23:57:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-14 23:57:39,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:39,487 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:39,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-14 23:57:39,691 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 [2023-02-14 23:57:39,692 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2023-02-14 23:57:39,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:39,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691766722] [2023-02-14 23:57:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:39,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:39,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:39,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521952705] [2023-02-14 23:57:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:39,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:39,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:39,705 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) [2023-02-14 23:57:39,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 23:57:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-14 23:57:39,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:39,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-14 23:57:40,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691766722] [2023-02-14 23:57:40,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521952705] [2023-02-14 23:57:40,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521952705] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:40,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:40,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-02-14 23:57:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800557216] [2023-02-14 23:57:40,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:40,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 23:57:40,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 23:57:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-14 23:57:40,063 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-14 23:57:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:40,646 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2023-02-14 23:57:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-14 23:57:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2023-02-14 23:57:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:40,650 INFO L225 Difference]: With dead ends: 1281 [2023-02-14 23:57:40,650 INFO L226 Difference]: Without dead ends: 791 [2023-02-14 23:57:40,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 23:57:40,652 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 376 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:40,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 497 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:57:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2023-02-14 23:57:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2023-02-14 23:57:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-14 23:57:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2023-02-14 23:57:40,768 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2023-02-14 23:57:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:40,768 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2023-02-14 23:57:40,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-02-14 23:57:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2023-02-14 23:57:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-14 23:57:40,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:40,770 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:40,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:40,976 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 [2023-02-14 23:57:40,977 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:40,978 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2023-02-14 23:57:40,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:40,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452559513] [2023-02-14 23:57:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:40,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:40,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:40,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118493723] [2023-02-14 23:57:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:40,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:40,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:41,007 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) [2023-02-14 23:57:41,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 23:57:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:41,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 23:57:41,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:41,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-14 23:57:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:41,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452559513] [2023-02-14 23:57:41,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:41,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118493723] [2023-02-14 23:57:41,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118493723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:41,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:41,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-14 23:57:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556639990] [2023-02-14 23:57:41,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:41,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 23:57:41,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 23:57:41,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-14 23:57:41,407 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-02-14 23:57:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:42,021 INFO L93 Difference]: Finished difference Result 846 states and 1157 transitions. [2023-02-14 23:57:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-14 23:57:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 99 [2023-02-14 23:57:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:42,024 INFO L225 Difference]: With dead ends: 846 [2023-02-14 23:57:42,024 INFO L226 Difference]: Without dead ends: 841 [2023-02-14 23:57:42,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 23:57:42,025 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 370 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:42,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 518 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:57:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-02-14 23:57:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 826. [2023-02-14 23:57:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 620 states have (on average 1.2) internal successors, (744), 626 states have internal predecessors, (744), 182 states have call successors, (182), 24 states have call predecessors, (182), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2023-02-14 23:57:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1107 transitions. [2023-02-14 23:57:42,152 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1107 transitions. Word has length 99 [2023-02-14 23:57:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:42,153 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1107 transitions. [2023-02-14 23:57:42,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-02-14 23:57:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1107 transitions. [2023-02-14 23:57:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-02-14 23:57:42,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:42,157 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:42,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:42,361 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 [2023-02-14 23:57:42,361 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:42,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:42,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1985812011, now seen corresponding path program 3 times [2023-02-14 23:57:42,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:42,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623256250] [2023-02-14 23:57:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:42,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:42,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:42,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19627805] [2023-02-14 23:57:42,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:57:42,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:42,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:42,390 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) [2023-02-14 23:57:42,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 23:57:42,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 23:57:42,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:42,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 23:57:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2023-02-14 23:57:42,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:42,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:42,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623256250] [2023-02-14 23:57:42,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:42,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19627805] [2023-02-14 23:57:42,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19627805] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:42,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:42,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 23:57:42,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537629028] [2023-02-14 23:57:42,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 23:57:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 23:57:42,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 23:57:42,489 INFO L87 Difference]: Start difference. First operand 826 states and 1107 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 23:57:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:42,674 INFO L93 Difference]: Finished difference Result 1099 states and 1478 transitions. [2023-02-14 23:57:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:57:42,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 177 [2023-02-14 23:57:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:42,682 INFO L225 Difference]: With dead ends: 1099 [2023-02-14 23:57:42,682 INFO L226 Difference]: Without dead ends: 892 [2023-02-14 23:57:42,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:57:42,684 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:42,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 172 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2023-02-14 23:57:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 857. [2023-02-14 23:57:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 644 states have (on average 1.1770186335403727) internal successors, (758), 651 states have internal predecessors, (758), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 176 states have call predecessors, (183), 183 states have call successors, (183) [2023-02-14 23:57:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1125 transitions. [2023-02-14 23:57:42,796 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1125 transitions. Word has length 177 [2023-02-14 23:57:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:42,797 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1125 transitions. [2023-02-14 23:57:42,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 23:57:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1125 transitions. [2023-02-14 23:57:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-14 23:57:42,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:42,801 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:42,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:43,005 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 [2023-02-14 23:57:43,006 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1858915778, now seen corresponding path program 4 times [2023-02-14 23:57:43,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:43,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690658182] [2023-02-14 23:57:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:43,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:43,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:43,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125431709] [2023-02-14 23:57:43,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:57:43,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:43,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:43,015 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) [2023-02-14 23:57:43,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 23:57:43,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:57:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-14 23:57:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2023-02-14 23:57:43,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:43,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:43,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690658182] [2023-02-14 23:57:43,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:43,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125431709] [2023-02-14 23:57:43,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125431709] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:43,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:43,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 23:57:43,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960012419] [2023-02-14 23:57:43,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:43,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 23:57:43,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:43,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 23:57:43,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:57:43,115 INFO L87 Difference]: Start difference. First operand 857 states and 1125 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-14 23:57:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:43,254 INFO L93 Difference]: Finished difference Result 1458 states and 1913 transitions. [2023-02-14 23:57:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 23:57:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 183 [2023-02-14 23:57:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:43,258 INFO L225 Difference]: With dead ends: 1458 [2023-02-14 23:57:43,258 INFO L226 Difference]: Without dead ends: 915 [2023-02-14 23:57:43,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:57:43,260 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:43,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 75 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2023-02-14 23:57:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 863. [2023-02-14 23:57:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 650 states have (on average 1.1753846153846155) internal successors, (764), 659 states have internal predecessors, (764), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) [2023-02-14 23:57:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1131 transitions. [2023-02-14 23:57:43,420 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1131 transitions. Word has length 183 [2023-02-14 23:57:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:43,420 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1131 transitions. [2023-02-14 23:57:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-14 23:57:43,421 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1131 transitions. [2023-02-14 23:57:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-14 23:57:43,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:43,423 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:43,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:43,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 23:57:43,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:43,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1116662802, now seen corresponding path program 5 times [2023-02-14 23:57:43,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:43,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330726366] [2023-02-14 23:57:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:43,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:43,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:43,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433832692] [2023-02-14 23:57:43,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:57:43,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:43,636 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:57:43,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 23:57:43,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-14 23:57:43,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 23:57:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2023-02-14 23:57:43,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:43,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:43,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330726366] [2023-02-14 23:57:43,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:43,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433832692] [2023-02-14 23:57:43,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433832692] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:43,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:43,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 23:57:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335332906] [2023-02-14 23:57:43,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:43,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:57:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:57:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:57:43,734 INFO L87 Difference]: Start difference. First operand 863 states and 1131 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:57:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:43,865 INFO L93 Difference]: Finished difference Result 883 states and 1150 transitions. [2023-02-14 23:57:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 23:57:43,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 183 [2023-02-14 23:57:43,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:43,868 INFO L225 Difference]: With dead ends: 883 [2023-02-14 23:57:43,868 INFO L226 Difference]: Without dead ends: 827 [2023-02-14 23:57:43,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 23:57:43,869 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:43,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:43,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2023-02-14 23:57:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 802. [2023-02-14 23:57:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 603 states have (on average 1.1691542288557213) internal successors, (705), 611 states have internal predecessors, (705), 175 states have call successors, (175), 24 states have call predecessors, (175), 23 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) [2023-02-14 23:57:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1054 transitions. [2023-02-14 23:57:43,967 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1054 transitions. Word has length 183 [2023-02-14 23:57:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:43,968 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1054 transitions. [2023-02-14 23:57:43,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:57:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1054 transitions. [2023-02-14 23:57:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-14 23:57:43,970 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:43,970 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:43,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-14 23:57:44,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 23:57:44,175 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:44,175 INFO L85 PathProgramCache]: Analyzing trace with hash -670817854, now seen corresponding path program 6 times [2023-02-14 23:57:44,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:44,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410691144] [2023-02-14 23:57:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:44,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:44,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:44,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141523717] [2023-02-14 23:57:44,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 23:57:44,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:44,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:44,183 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:57:44,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 23:57:44,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 23:57:44,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 23:57:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2023-02-14 23:57:44,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:57:44,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410691144] [2023-02-14 23:57:44,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141523717] [2023-02-14 23:57:44,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141523717] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:57:44,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:57:44,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 23:57:44,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212970976] [2023-02-14 23:57:44,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:57:44,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:57:44,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:44,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:57:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:57:44,627 INFO L87 Difference]: Start difference. First operand 802 states and 1054 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 23:57:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:44,842 INFO L93 Difference]: Finished difference Result 849 states and 1103 transitions. [2023-02-14 23:57:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:57:44,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 183 [2023-02-14 23:57:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:44,846 INFO L225 Difference]: With dead ends: 849 [2023-02-14 23:57:44,846 INFO L226 Difference]: Without dead ends: 778 [2023-02-14 23:57:44,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:57:44,847 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:44,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:57:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-02-14 23:57:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 751. [2023-02-14 23:57:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 565 states have (on average 1.1628318584070796) internal successors, (657), 572 states have internal predecessors, (657), 162 states have call successors, (162), 24 states have call predecessors, (162), 23 states have return successors, (161), 154 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-14 23:57:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 980 transitions. [2023-02-14 23:57:44,954 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 980 transitions. Word has length 183 [2023-02-14 23:57:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:44,957 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 980 transitions. [2023-02-14 23:57:44,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 23:57:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 980 transitions. [2023-02-14 23:57:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-14 23:57:44,959 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:44,960 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:44,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:45,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 23:57:45,165 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1332064508, now seen corresponding path program 7 times [2023-02-14 23:57:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:45,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863926657] [2023-02-14 23:57:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:45,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340672232] [2023-02-14 23:57:45,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 23:57:45,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:45,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:45,178 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:57:45,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 23:57:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:57:45,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 23:57:45,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-14 23:57:45,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-14 23:57:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:45,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863926657] [2023-02-14 23:57:45,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:45,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340672232] [2023-02-14 23:57:45,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340672232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:45,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:45,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2023-02-14 23:57:45,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343061089] [2023-02-14 23:57:45,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:45,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 23:57:45,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 23:57:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:57:45,526 INFO L87 Difference]: Start difference. First operand 751 states and 980 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2023-02-14 23:57:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:46,259 INFO L93 Difference]: Finished difference Result 1716 states and 2271 transitions. [2023-02-14 23:57:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 23:57:46,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) Word has length 183 [2023-02-14 23:57:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:46,264 INFO L225 Difference]: With dead ends: 1716 [2023-02-14 23:57:46,264 INFO L226 Difference]: Without dead ends: 1519 [2023-02-14 23:57:46,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 350 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-02-14 23:57:46,265 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 126 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:46,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 889 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:57:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2023-02-14 23:57:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1310. [2023-02-14 23:57:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 985 states have (on average 1.1796954314720811) internal successors, (1162), 1001 states have internal predecessors, (1162), 301 states have call successors, (301), 24 states have call predecessors, (301), 23 states have return successors, (300), 284 states have call predecessors, (300), 300 states have call successors, (300) [2023-02-14 23:57:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1763 transitions. [2023-02-14 23:57:46,470 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1763 transitions. Word has length 183 [2023-02-14 23:57:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:46,470 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1763 transitions. [2023-02-14 23:57:46,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2023-02-14 23:57:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1763 transitions. [2023-02-14 23:57:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-14 23:57:46,474 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:46,474 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:46,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:46,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:46,689 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:46,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1762868398, now seen corresponding path program 8 times [2023-02-14 23:57:46,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:46,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925867796] [2023-02-14 23:57:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:46,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:46,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:46,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995628612] [2023-02-14 23:57:46,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:57:46,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:46,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:46,713 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:57:46,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 23:57:46,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:57:46,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:46,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 23:57:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-14 23:57:46,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2023-02-14 23:57:47,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:47,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925867796] [2023-02-14 23:57:47,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:47,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995628612] [2023-02-14 23:57:47,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995628612] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:47,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:47,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-02-14 23:57:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131306711] [2023-02-14 23:57:47,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:47,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 23:57:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 23:57:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:57:47,106 INFO L87 Difference]: Start difference. First operand 1310 states and 1763 transitions. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-14 23:57:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:48,319 INFO L93 Difference]: Finished difference Result 2710 states and 3671 transitions. [2023-02-14 23:57:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 23:57:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 183 [2023-02-14 23:57:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:48,326 INFO L225 Difference]: With dead ends: 2710 [2023-02-14 23:57:48,326 INFO L226 Difference]: Without dead ends: 2413 [2023-02-14 23:57:48,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 23:57:48,328 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 183 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:48,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 764 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:57:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2023-02-14 23:57:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1964. [2023-02-14 23:57:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1474 states have (on average 1.162822252374491) internal successors, (1714), 1502 states have internal predecessors, (1714), 466 states have call successors, (466), 24 states have call predecessors, (466), 23 states have return successors, (465), 437 states have call predecessors, (465), 465 states have call successors, (465) [2023-02-14 23:57:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2645 transitions. [2023-02-14 23:57:48,662 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2645 transitions. Word has length 183 [2023-02-14 23:57:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:48,662 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2645 transitions. [2023-02-14 23:57:48,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-14 23:57:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2645 transitions. [2023-02-14 23:57:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-14 23:57:48,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:48,667 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:48,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:48,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:48,872 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash 144972548, now seen corresponding path program 9 times [2023-02-14 23:57:48,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:48,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164331121] [2023-02-14 23:57:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:48,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:48,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:48,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931764763] [2023-02-14 23:57:48,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:57:48,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:48,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:48,881 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:57:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 23:57:50,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-14 23:57:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:50,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 23:57:50,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2023-02-14 23:57:51,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2023-02-14 23:57:51,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164331121] [2023-02-14 23:57:51,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931764763] [2023-02-14 23:57:51,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931764763] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:51,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:51,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2023-02-14 23:57:51,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807730593] [2023-02-14 23:57:51,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:51,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 23:57:51,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 23:57:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-02-14 23:57:51,382 INFO L87 Difference]: Start difference. First operand 1964 states and 2645 transitions. Second operand has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2023-02-14 23:57:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:53,634 INFO L93 Difference]: Finished difference Result 3248 states and 4391 transitions. [2023-02-14 23:57:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-14 23:57:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) Word has length 183 [2023-02-14 23:57:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:53,644 INFO L225 Difference]: With dead ends: 3248 [2023-02-14 23:57:53,644 INFO L226 Difference]: Without dead ends: 2989 [2023-02-14 23:57:53,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=507, Invalid=2573, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 23:57:53,646 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 233 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:53,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 2273 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-14 23:57:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2023-02-14 23:57:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2458. [2023-02-14 23:57:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 1844 states have (on average 1.1719088937093276) internal successors, (2161), 1886 states have internal predecessors, (2161), 590 states have call successors, (590), 24 states have call predecessors, (590), 23 states have return successors, (589), 547 states have call predecessors, (589), 589 states have call successors, (589) [2023-02-14 23:57:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3340 transitions. [2023-02-14 23:57:54,115 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3340 transitions. Word has length 183 [2023-02-14 23:57:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:57:54,115 INFO L495 AbstractCegarLoop]: Abstraction has 2458 states and 3340 transitions. [2023-02-14 23:57:54,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2023-02-14 23:57:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3340 transitions. [2023-02-14 23:57:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-14 23:57:54,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:57:54,122 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:57:54,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 23:57:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:54,329 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:57:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:57:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1027204868, now seen corresponding path program 10 times [2023-02-14 23:57:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:57:54,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249141318] [2023-02-14 23:57:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:57:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:57:54,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:57:54,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609684323] [2023-02-14 23:57:54,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:57:54,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:57:54,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:57:54,342 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:57:54,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 23:57:54,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:57:54,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:57:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 23:57:54,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:57:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:57:54,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:57:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2023-02-14 23:57:55,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:57:55,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249141318] [2023-02-14 23:57:55,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:57:55,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609684323] [2023-02-14 23:57:55,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609684323] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:57:55,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:57:55,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2023-02-14 23:57:55,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944427161] [2023-02-14 23:57:55,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:57:55,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 23:57:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:57:55,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 23:57:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2023-02-14 23:57:55,309 INFO L87 Difference]: Start difference. First operand 2458 states and 3340 transitions. Second operand has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2023-02-14 23:57:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:57:58,552 INFO L93 Difference]: Finished difference Result 9902 states and 14921 transitions. [2023-02-14 23:57:58,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-14 23:57:58,553 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) Word has length 183 [2023-02-14 23:57:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:57:58,581 INFO L225 Difference]: With dead ends: 9902 [2023-02-14 23:57:58,581 INFO L226 Difference]: Without dead ends: 9893 [2023-02-14 23:57:58,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2023-02-14 23:57:58,584 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 915 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 23:57:58,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 856 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 23:57:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9893 states. [2023-02-14 23:58:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9893 to 9641. [2023-02-14 23:58:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9641 states, 7244 states have (on average 1.2642186637217008) internal successors, (9158), 7307 states have internal predecessors, (9158), 2353 states have call successors, (2353), 44 states have call predecessors, (2353), 43 states have return successors, (2352), 2289 states have call predecessors, (2352), 2352 states have call successors, (2352) [2023-02-14 23:58:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9641 states to 9641 states and 13863 transitions. [2023-02-14 23:58:00,556 INFO L78 Accepts]: Start accepts. Automaton has 9641 states and 13863 transitions. Word has length 183 [2023-02-14 23:58:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:58:00,557 INFO L495 AbstractCegarLoop]: Abstraction has 9641 states and 13863 transitions. [2023-02-14 23:58:00,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2023-02-14 23:58:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 9641 states and 13863 transitions. [2023-02-14 23:58:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-02-14 23:58:00,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:58:00,565 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:58:00,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 23:58:00,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:58:00,770 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:58:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:58:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1981009717, now seen corresponding path program 2 times [2023-02-14 23:58:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:58:00,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359269919] [2023-02-14 23:58:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:58:00,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:58:00,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:58:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612833036] [2023-02-14 23:58:00,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:58:00,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:58:00,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:58:00,779 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:58:00,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 23:58:00,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:58:00,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:58:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-14 23:58:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:58:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:58:01,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:58:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2023-02-14 23:58:01,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:58:01,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359269919] [2023-02-14 23:58:01,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:58:01,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612833036] [2023-02-14 23:58:01,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612833036] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:58:01,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:58:01,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2023-02-14 23:58:01,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983118678] [2023-02-14 23:58:01,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:58:01,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 23:58:01,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:58:01,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 23:58:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 23:58:01,796 INFO L87 Difference]: Start difference. First operand 9641 states and 13863 transitions. Second operand has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2023-02-14 23:58:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:58:04,643 INFO L93 Difference]: Finished difference Result 14788 states and 21459 transitions. [2023-02-14 23:58:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-02-14 23:58:04,643 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) Word has length 189 [2023-02-14 23:58:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:58:04,663 INFO L225 Difference]: With dead ends: 14788 [2023-02-14 23:58:04,663 INFO L226 Difference]: Without dead ends: 7693 [2023-02-14 23:58:04,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2023-02-14 23:58:04,679 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 914 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:58:04,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 842 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 23:58:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2023-02-14 23:58:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7466. [2023-02-14 23:58:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7466 states, 5599 states have (on average 1.1821753884622255) internal successors, (6619), 5643 states have internal predecessors, (6619), 1821 states have call successors, (1821), 46 states have call predecessors, (1821), 45 states have return successors, (1820), 1776 states have call predecessors, (1820), 1820 states have call successors, (1820) [2023-02-14 23:58:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7466 states to 7466 states and 10260 transitions. [2023-02-14 23:58:06,227 INFO L78 Accepts]: Start accepts. Automaton has 7466 states and 10260 transitions. Word has length 189 [2023-02-14 23:58:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:58:06,228 INFO L495 AbstractCegarLoop]: Abstraction has 7466 states and 10260 transitions. [2023-02-14 23:58:06,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2023-02-14 23:58:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7466 states and 10260 transitions. [2023-02-14 23:58:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-02-14 23:58:06,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:58:06,235 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:58:06,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-14 23:58:06,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:58:06,440 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:58:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:58:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935086, now seen corresponding path program 2 times [2023-02-14 23:58:06,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:58:06,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734067310] [2023-02-14 23:58:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:58:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:58:06,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:58:06,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220922900] [2023-02-14 23:58:06,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:58:06,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:58:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:58:06,457 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:58:06,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 23:58:06,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:58:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:58:06,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-14 23:58:06,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:58:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:58:06,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:58:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2023-02-14 23:58:07,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:58:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734067310] [2023-02-14 23:58:07,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:58:07,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220922900] [2023-02-14 23:58:07,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220922900] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:58:07,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:58:07,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2023-02-14 23:58:07,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901801537] [2023-02-14 23:58:07,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:58:07,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-14 23:58:07,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:58:07,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-14 23:58:07,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2023-02-14 23:58:07,422 INFO L87 Difference]: Start difference. First operand 7466 states and 10260 transitions. Second operand has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2023-02-14 23:58:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:58:10,103 INFO L93 Difference]: Finished difference Result 8072 states and 11145 transitions. [2023-02-14 23:58:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-02-14 23:58:10,104 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 195 [2023-02-14 23:58:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:58:10,118 INFO L225 Difference]: With dead ends: 8072 [2023-02-14 23:58:10,118 INFO L226 Difference]: Without dead ends: 7923 [2023-02-14 23:58:10,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2023-02-14 23:58:10,122 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 768 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 23:58:10,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 828 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 23:58:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2023-02-14 23:58:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 7216. [2023-02-14 23:58:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7216 states, 5412 states have (on average 1.121212121212121) internal successors, (6068), 5456 states have internal predecessors, (6068), 1756 states have call successors, (1756), 48 states have call predecessors, (1756), 47 states have return successors, (1755), 1711 states have call predecessors, (1755), 1755 states have call successors, (1755) [2023-02-14 23:58:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7216 states to 7216 states and 9579 transitions. [2023-02-14 23:58:11,581 INFO L78 Accepts]: Start accepts. Automaton has 7216 states and 9579 transitions. Word has length 195 [2023-02-14 23:58:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:58:11,582 INFO L495 AbstractCegarLoop]: Abstraction has 7216 states and 9579 transitions. [2023-02-14 23:58:11,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2023-02-14 23:58:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7216 states and 9579 transitions. [2023-02-14 23:58:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-02-14 23:58:11,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:58:11,598 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:58:11,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-14 23:58:11,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:58:11,803 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:58:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:58:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1339328528, now seen corresponding path program 11 times [2023-02-14 23:58:11,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:58:11,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802771281] [2023-02-14 23:58:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:58:11,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:58:11,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:58:11,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373640545] [2023-02-14 23:58:11,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:58:11,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:58:11,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:58:11,817 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:58:11,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-14 23:58:12,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-02-14 23:58:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:58:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 23:58:12,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:58:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 364 proven. 1120 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2023-02-14 23:58:13,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:58:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 364 proven. 1120 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2023-02-14 23:58:13,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:58:13,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802771281] [2023-02-14 23:58:13,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:58:13,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373640545] [2023-02-14 23:58:13,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373640545] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:58:13,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:58:13,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2023-02-14 23:58:13,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96302498] [2023-02-14 23:58:13,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:58:13,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 23:58:13,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:58:13,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 23:58:13,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 23:58:13,836 INFO L87 Difference]: Start difference. First operand 7216 states and 9579 transitions. Second operand has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) [2023-02-14 23:58:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:58:27,180 INFO L93 Difference]: Finished difference Result 18492 states and 24840 transitions. [2023-02-14 23:58:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-02-14 23:58:27,180 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) Word has length 375 [2023-02-14 23:58:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:58:27,208 INFO L225 Difference]: With dead ends: 18492 [2023-02-14 23:58:27,209 INFO L226 Difference]: Without dead ends: 16293 [2023-02-14 23:58:27,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5122 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4365, Invalid=15375, Unknown=0, NotChecked=0, Total=19740 [2023-02-14 23:58:27,218 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 1208 mSDsluCounter, 4080 mSDsCounter, 0 mSdLazyCounter, 6527 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 4630 SdHoareTripleChecker+Invalid, 7248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 6527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:58:27,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 4630 Invalid, 7248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 6527 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-02-14 23:58:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2023-02-14 23:58:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 11009. [2023-02-14 23:58:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11009 states, 8256 states have (on average 1.1242732558139534) internal successors, (9282), 8337 states have internal predecessors, (9282), 2705 states have call successors, (2705), 48 states have call predecessors, (2705), 47 states have return successors, (2704), 2623 states have call predecessors, (2704), 2704 states have call successors, (2704) [2023-02-14 23:58:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11009 states to 11009 states and 14691 transitions. [2023-02-14 23:58:30,328 INFO L78 Accepts]: Start accepts. Automaton has 11009 states and 14691 transitions. Word has length 375 [2023-02-14 23:58:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:58:30,329 INFO L495 AbstractCegarLoop]: Abstraction has 11009 states and 14691 transitions. [2023-02-14 23:58:30,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.2105263157894735) internal successors, (274), 38 states have internal predecessors, (274), 38 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 37 states have call predecessors, (87), 37 states have call successors, (87) [2023-02-14 23:58:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11009 states and 14691 transitions. [2023-02-14 23:58:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-02-14 23:58:30,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:58:30,352 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:58:30,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-14 23:58:30,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-14 23:58:30,558 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:58:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:58:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2073406448, now seen corresponding path program 12 times [2023-02-14 23:58:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:58:30,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726372] [2023-02-14 23:58:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:58:30,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:58:30,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:58:30,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204689886] [2023-02-14 23:58:30,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 23:58:30,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:58:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:58:30,573 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:58:30,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process