./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/uthash-2.0.2/uthash_SAX_test10-3.i -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 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 04:50:16,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 04:50:16,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 04:50:16,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 04:50:16,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 04:50:16,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 04:50:16,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 04:50:16,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 04:50:16,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 04:50:16,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 04:50:16,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 04:50:16,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 04:50:16,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 04:50:16,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 04:50:16,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 04:50:16,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 04:50:16,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 04:50:16,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 04:50:16,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 04:50:16,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 04:50:16,971 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 04:50:16,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 04:50:16,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 04:50:16,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 04:50:16,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 04:50:16,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 04:50:16,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 04:50:16,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 04:50:16,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 04:50:16,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 04:50:16,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 04:50:16,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 04:50:16,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 04:50:16,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 04:50:16,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 04:50:16,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 04:50:16,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 04:50:16,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 04:50:16,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 04:50:16,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 04:50:16,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 04:50:16,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 04:50:16,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 04:50:17,019 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 04:50:17,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 04:50:17,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 04:50:17,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 04:50:17,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 04:50:17,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 04:50:17,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 04:50:17,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 04:50:17,022 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 04:50:17,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 04:50:17,023 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 04:50:17,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 04:50:17,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 04:50:17,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 04:50:17,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 04:50:17,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 04:50:17,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 04:50:17,024 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 04:50:17,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 04:50:17,026 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 04:50:17,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 04:50:17,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 04:50:17,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 04:50:17,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 04:50:17,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 04:50:17,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 04:50:17,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 04:50:17,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 04:50:17,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 04:50:17,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 04:50:17,028 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 04:50:17,028 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 04:50:17,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 04:50:17,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2022-07-20 04:50:17,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 04:50:17,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 04:50:17,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 04:50:17,253 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 04:50:17,254 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 04:50:17,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-07-20 04:50:17,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08085b790/c0c271b001574d4ca1216e42111d8a57/FLAGbd67ce173 [2022-07-20 04:50:17,802 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 04:50:17,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-07-20 04:50:17,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08085b790/c0c271b001574d4ca1216e42111d8a57/FLAGbd67ce173 [2022-07-20 04:50:18,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08085b790/c0c271b001574d4ca1216e42111d8a57 [2022-07-20 04:50:18,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 04:50:18,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 04:50:18,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 04:50:18,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 04:50:18,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 04:50:18,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:50:18" (1/1) ... [2022-07-20 04:50:18,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b1757c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:18, skipping insertion in model container [2022-07-20 04:50:18,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:50:18" (1/1) ... [2022-07-20 04:50:18,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 04:50:18,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 04:50:18,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-07-20 04:50:18,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 04:50:18,874 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 04:50:18,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-07-20 04:50:18,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 04:50:18,999 INFO L208 MainTranslator]: Completed translation [2022-07-20 04:50:19,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19 WrapperNode [2022-07-20 04:50:19,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 04:50:19,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 04:50:19,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 04:50:19,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 04:50:19,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,176 INFO L137 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2467 [2022-07-20 04:50:19,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 04:50:19,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 04:50:19,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 04:50:19,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 04:50:19,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 04:50:19,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 04:50:19,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 04:50:19,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 04:50:19,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (1/1) ... [2022-07-20 04:50:19,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 04:50:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:19,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 04:50:19,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 04:50:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-20 04:50:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-20 04:50:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 04:50:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 04:50:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 04:50:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 04:50:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-20 04:50:19,404 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-20 04:50:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 04:50:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 04:50:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 04:50:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 04:50:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-20 04:50:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 04:50:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 04:50:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 04:50:19,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 04:50:19,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 04:50:19,685 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 04:50:19,686 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 04:50:21,057 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 04:50:21,064 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 04:50:21,064 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2022-07-20 04:50:21,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:50:21 BoogieIcfgContainer [2022-07-20 04:50:21,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 04:50:21,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 04:50:21,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 04:50:21,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 04:50:21,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:50:18" (1/3) ... [2022-07-20 04:50:21,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c2d433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:50:21, skipping insertion in model container [2022-07-20 04:50:21,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:50:19" (2/3) ... [2022-07-20 04:50:21,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c2d433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:50:21, skipping insertion in model container [2022-07-20 04:50:21,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:50:21" (3/3) ... [2022-07-20 04:50:21,072 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-3.i [2022-07-20 04:50:21,081 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 04:50:21,082 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 04:50:21,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 04:50:21,148 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c81bc07, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2614977d [2022-07-20 04:50:21,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 04:50:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 04:50:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 04:50:21,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:21,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:21,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:21,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1002051803, now seen corresponding path program 1 times [2022-07-20 04:50:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:21,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079917809] [2022-07-20 04:50:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:21,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:50:21,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079917809] [2022-07-20 04:50:21,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079917809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:21,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:21,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 04:50:21,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242815235] [2022-07-20 04:50:21,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:21,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 04:50:21,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 04:50:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 04:50:21,291 INFO L87 Difference]: Start difference. First operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:21,334 INFO L93 Difference]: Finished difference Result 954 states and 1634 transitions. [2022-07-20 04:50:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 04:50:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 04:50:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:21,347 INFO L225 Difference]: With dead ends: 954 [2022-07-20 04:50:21,347 INFO L226 Difference]: Without dead ends: 424 [2022-07-20 04:50:21,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 04:50:21,353 INFO L413 NwaCegarLoop]: 638 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, 638 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 [2022-07-20 04:50:21,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:50:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-07-20 04:50:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-07-20 04:50:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 411 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 04:50:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 565 transitions. [2022-07-20 04:50:21,412 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 565 transitions. Word has length 13 [2022-07-20 04:50:21,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:21,412 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 565 transitions. [2022-07-20 04:50:21,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 565 transitions. [2022-07-20 04:50:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 04:50:21,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:21,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:21,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 04:50:21,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1116117503, now seen corresponding path program 1 times [2022-07-20 04:50:21,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:21,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163706445] [2022-07-20 04:50:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:21,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:50:21,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:21,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163706445] [2022-07-20 04:50:21,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163706445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:21,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:21,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 04:50:21,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049339441] [2022-07-20 04:50:21,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:21,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 04:50:21,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:21,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 04:50:21,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 04:50:21,521 INFO L87 Difference]: Start difference. First operand 424 states and 565 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:21,923 INFO L93 Difference]: Finished difference Result 745 states and 997 transitions. [2022-07-20 04:50:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 04:50:21,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-20 04:50:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:21,926 INFO L225 Difference]: With dead ends: 745 [2022-07-20 04:50:21,927 INFO L226 Difference]: Without dead ends: 499 [2022-07-20 04:50:21,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:50:21,928 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 96 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:21,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1471 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 04:50:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-07-20 04:50:21,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 426. [2022-07-20 04:50:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 408 states have (on average 1.3235294117647058) internal successors, (540), 413 states have internal predecessors, (540), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 04:50:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 567 transitions. [2022-07-20 04:50:21,948 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 567 transitions. Word has length 48 [2022-07-20 04:50:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:21,949 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 567 transitions. [2022-07-20 04:50:21,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 567 transitions. [2022-07-20 04:50:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 04:50:21,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:21,952 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:21,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 04:50:21,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1476092237, now seen corresponding path program 1 times [2022-07-20 04:50:21,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:21,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680705976] [2022-07-20 04:50:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:21,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:22,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:22,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125963310] [2022-07-20 04:50:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:22,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:22,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:22,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 04:50:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:22,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:50:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:50:22,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:22,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680705976] [2022-07-20 04:50:22,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125963310] [2022-07-20 04:50:22,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125963310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:22,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:22,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:50:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732203715] [2022-07-20 04:50:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:22,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:50:22,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:50:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:22,834 INFO L87 Difference]: Start difference. First operand 426 states and 567 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:22,894 INFO L93 Difference]: Finished difference Result 869 states and 1161 transitions. [2022-07-20 04:50:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:50:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-20 04:50:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:22,896 INFO L225 Difference]: With dead ends: 869 [2022-07-20 04:50:22,896 INFO L226 Difference]: Without dead ends: 447 [2022-07-20 04:50:22,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:22,898 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:22,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:50:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-07-20 04:50:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2022-07-20 04:50:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 428 states have (on average 1.308411214953271) internal successors, (560), 433 states have internal predecessors, (560), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 04:50:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 587 transitions. [2022-07-20 04:50:22,907 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 587 transitions. Word has length 101 [2022-07-20 04:50:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:22,908 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 587 transitions. [2022-07-20 04:50:22,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 587 transitions. [2022-07-20 04:50:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 04:50:22,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:22,912 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:22,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 04:50:23,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:23,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash -418254159, now seen corresponding path program 1 times [2022-07-20 04:50:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:23,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473973848] [2022-07-20 04:50:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:23,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:23,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244113299] [2022-07-20 04:50:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:23,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:23,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:23,222 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:23,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 04:50:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:50:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 04:50:23,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:23,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:23,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473973848] [2022-07-20 04:50:23,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244113299] [2022-07-20 04:50:23,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244113299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:23,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:23,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:50:23,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929858283] [2022-07-20 04:50:23,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:23,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:50:23,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:50:23,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:23,922 INFO L87 Difference]: Start difference. First operand 446 states and 587 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:24,006 INFO L93 Difference]: Finished difference Result 701 states and 934 transitions. [2022-07-20 04:50:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:50:24,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-20 04:50:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:24,018 INFO L225 Difference]: With dead ends: 701 [2022-07-20 04:50:24,018 INFO L226 Difference]: Without dead ends: 467 [2022-07-20 04:50:24,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:24,019 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:24,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 04:50:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-20 04:50:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2022-07-20 04:50:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 448 states have (on average 1.2946428571428572) internal successors, (580), 453 states have internal predecessors, (580), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 04:50:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 607 transitions. [2022-07-20 04:50:24,045 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 607 transitions. Word has length 101 [2022-07-20 04:50:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:24,046 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 607 transitions. [2022-07-20 04:50:24,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 607 transitions. [2022-07-20 04:50:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 04:50:24,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:24,048 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:24,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-20 04:50:24,249 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,SelfDestructingSolverStorable3 [2022-07-20 04:50:24,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash -637108877, now seen corresponding path program 1 times [2022-07-20 04:50:24,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:24,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875664410] [2022-07-20 04:50:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:24,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:24,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:24,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945696341] [2022-07-20 04:50:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:24,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:24,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 04:50:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:50:25,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:50:25,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:25,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:25,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875664410] [2022-07-20 04:50:25,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:25,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945696341] [2022-07-20 04:50:25,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945696341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:25,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:25,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 04:50:25,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483224767] [2022-07-20 04:50:25,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:25,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 04:50:25,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:25,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 04:50:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 04:50:25,094 INFO L87 Difference]: Start difference. First operand 466 states and 607 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:25,152 INFO L93 Difference]: Finished difference Result 1004 states and 1314 transitions. [2022-07-20 04:50:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 04:50:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-20 04:50:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:25,154 INFO L225 Difference]: With dead ends: 1004 [2022-07-20 04:50:25,154 INFO L226 Difference]: Without dead ends: 542 [2022-07-20 04:50:25,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:50:25,156 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 506 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:25,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1460 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:50:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-07-20 04:50:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2022-07-20 04:50:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 434 states have (on average 1.2880184331797235) internal successors, (559), 439 states have internal predecessors, (559), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 04:50:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2022-07-20 04:50:25,167 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 101 [2022-07-20 04:50:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:25,168 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2022-07-20 04:50:25,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2022-07-20 04:50:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 04:50:25,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:25,170 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:25,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-20 04:50:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:25,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash 416687617, now seen corresponding path program 1 times [2022-07-20 04:50:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:25,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66220778] [2022-07-20 04:50:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:25,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:25,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832230918] [2022-07-20 04:50:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:25,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:25,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:25,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:25,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 04:50:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:50:26,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 04:50:26,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:26,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66220778] [2022-07-20 04:50:26,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832230918] [2022-07-20 04:50:26,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832230918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:26,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:26,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 04:50:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689153717] [2022-07-20 04:50:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:26,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 04:50:26,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 04:50:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 04:50:26,534 INFO L87 Difference]: Start difference. First operand 452 states and 586 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:26,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:26,610 INFO L93 Difference]: Finished difference Result 675 states and 882 transitions. [2022-07-20 04:50:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 04:50:26,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-20 04:50:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:26,613 INFO L225 Difference]: With dead ends: 675 [2022-07-20 04:50:26,614 INFO L226 Difference]: Without dead ends: 439 [2022-07-20 04:50:26,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:50:26,615 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 287 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:26,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 04:50:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-20 04:50:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 438. [2022-07-20 04:50:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 420 states have (on average 1.2809523809523808) internal successors, (538), 425 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 04:50:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 565 transitions. [2022-07-20 04:50:26,625 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 565 transitions. Word has length 101 [2022-07-20 04:50:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:26,625 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 565 transitions. [2022-07-20 04:50:26,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 565 transitions. [2022-07-20 04:50:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 04:50:26,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:26,627 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:26,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 04:50:26,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:26,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 893903923, now seen corresponding path program 1 times [2022-07-20 04:50:26,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:26,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272753978] [2022-07-20 04:50:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:26,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:26,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778111591] [2022-07-20 04:50:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:26,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:26,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:26,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:26,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 04:50:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:27,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 04:50:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 04:50:27,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272753978] [2022-07-20 04:50:27,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778111591] [2022-07-20 04:50:27,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778111591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:27,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:27,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:50:27,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863910436] [2022-07-20 04:50:27,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:27,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:50:27,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:50:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:27,853 INFO L87 Difference]: Start difference. First operand 438 states and 565 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:27,908 INFO L93 Difference]: Finished difference Result 1102 states and 1424 transitions. [2022-07-20 04:50:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:50:27,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-20 04:50:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:27,911 INFO L225 Difference]: With dead ends: 1102 [2022-07-20 04:50:27,911 INFO L226 Difference]: Without dead ends: 668 [2022-07-20 04:50:27,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:27,912 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 249 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:27,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1126 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:50:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-20 04:50:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 664. [2022-07-20 04:50:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2792511700468019) internal successors, (820), 646 states have internal predecessors, (820), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 04:50:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 857 transitions. [2022-07-20 04:50:27,926 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 857 transitions. Word has length 101 [2022-07-20 04:50:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:27,926 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 857 transitions. [2022-07-20 04:50:27,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 04:50:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 857 transitions. [2022-07-20 04:50:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 04:50:27,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:27,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:27,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 04:50:28,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:28,150 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1884551189, now seen corresponding path program 1 times [2022-07-20 04:50:28,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:28,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290196137] [2022-07-20 04:50:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:28,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:28,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:28,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893665483] [2022-07-20 04:50:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:28,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:28,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:28,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:28,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 04:50:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 04:50:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:28,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 04:50:28,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 04:50:28,997 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 04:50:28,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 04:50:29,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 04:50:29,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 04:50:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 04:50:29,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:29,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:29,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290196137] [2022-07-20 04:50:29,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:29,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893665483] [2022-07-20 04:50:29,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893665483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:29,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:29,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 04:50:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556128357] [2022-07-20 04:50:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 04:50:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 04:50:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:50:29,029 INFO L87 Difference]: Start difference. First operand 664 states and 857 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:50:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:29,695 INFO L93 Difference]: Finished difference Result 1238 states and 1596 transitions. [2022-07-20 04:50:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 04:50:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2022-07-20 04:50:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:29,698 INFO L225 Difference]: With dead ends: 1238 [2022-07-20 04:50:29,698 INFO L226 Difference]: Without dead ends: 664 [2022-07-20 04:50:29,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 04:50:29,699 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 95 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:29,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1839 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 04:50:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-07-20 04:50:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2022-07-20 04:50:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 646 states have internal predecessors, (819), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 04:50:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 856 transitions. [2022-07-20 04:50:29,714 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 856 transitions. Word has length 116 [2022-07-20 04:50:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:29,714 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 856 transitions. [2022-07-20 04:50:29,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:50:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 856 transitions. [2022-07-20 04:50:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-20 04:50:29,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:29,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:29,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 04:50:29,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:29,938 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:29,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:29,939 INFO L85 PathProgramCache]: Analyzing trace with hash -227193184, now seen corresponding path program 1 times [2022-07-20 04:50:29,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:29,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328124861] [2022-07-20 04:50:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:29,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:30,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:30,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625297084] [2022-07-20 04:50:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:30,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:30,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:30,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:30,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 04:50:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:31,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:50:31,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 04:50:31,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:31,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:31,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328124861] [2022-07-20 04:50:31,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:31,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625297084] [2022-07-20 04:50:31,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625297084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:31,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:31,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:50:31,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276236880] [2022-07-20 04:50:31,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:31,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:50:31,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:50:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:31,050 INFO L87 Difference]: Start difference. First operand 664 states and 856 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:50:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:31,099 INFO L93 Difference]: Finished difference Result 1352 states and 1753 transitions. [2022-07-20 04:50:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:50:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-07-20 04:50:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:31,102 INFO L225 Difference]: With dead ends: 1352 [2022-07-20 04:50:31,102 INFO L226 Difference]: Without dead ends: 706 [2022-07-20 04:50:31,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:31,103 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 9 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:31,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1047 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:50:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-07-20 04:50:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2022-07-20 04:50:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 681 states have (on average 1.261380323054332) internal successors, (859), 686 states have internal predecessors, (859), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 04:50:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 896 transitions. [2022-07-20 04:50:31,116 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 896 transitions. Word has length 163 [2022-07-20 04:50:31,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:31,116 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 896 transitions. [2022-07-20 04:50:31,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:50:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 896 transitions. [2022-07-20 04:50:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-20 04:50:31,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:31,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:31,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-20 04:50:31,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:31,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:31,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2136648478, now seen corresponding path program 1 times [2022-07-20 04:50:31,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:31,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235658413] [2022-07-20 04:50:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:31,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:31,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:31,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365064244] [2022-07-20 04:50:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:31,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:31,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:31,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:31,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 04:50:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:32,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 04:50:32,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 04:50:32,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:32,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:32,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235658413] [2022-07-20 04:50:32,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:32,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365064244] [2022-07-20 04:50:32,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365064244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:32,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:32,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 04:50:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046076139] [2022-07-20 04:50:32,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:32,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 04:50:32,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:32,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 04:50:32,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 04:50:32,676 INFO L87 Difference]: Start difference. First operand 704 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:50:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:32,741 INFO L93 Difference]: Finished difference Result 1346 states and 1718 transitions. [2022-07-20 04:50:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 04:50:32,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-07-20 04:50:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:32,744 INFO L225 Difference]: With dead ends: 1346 [2022-07-20 04:50:32,744 INFO L226 Difference]: Without dead ends: 678 [2022-07-20 04:50:32,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:50:32,746 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 492 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:32,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1099 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:50:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-07-20 04:50:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2022-07-20 04:50:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 653 states have (on average 1.2511485451761102) internal successors, (817), 658 states have internal predecessors, (817), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 04:50:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 854 transitions. [2022-07-20 04:50:32,762 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 854 transitions. Word has length 163 [2022-07-20 04:50:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:32,763 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 854 transitions. [2022-07-20 04:50:32,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:50:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 854 transitions. [2022-07-20 04:50:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-20 04:50:32,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:32,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:32,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 04:50:32,987 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,SelfDestructingSolverStorable9 [2022-07-20 04:50:32,988 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1984933676, now seen corresponding path program 1 times [2022-07-20 04:50:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:32,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339053600] [2022-07-20 04:50:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:33,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:33,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308388944] [2022-07-20 04:50:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:33,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:33,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:33,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:33,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 04:50:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 04:50:34,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 04:50:34,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:34,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:34,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339053600] [2022-07-20 04:50:34,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:34,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308388944] [2022-07-20 04:50:34,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308388944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:34,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:34,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 04:50:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685675010] [2022-07-20 04:50:34,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:34,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 04:50:34,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 04:50:34,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:34,326 INFO L87 Difference]: Start difference. First operand 676 states and 854 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:50:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:34,382 INFO L93 Difference]: Finished difference Result 1533 states and 1962 transitions. [2022-07-20 04:50:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 04:50:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-07-20 04:50:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:34,386 INFO L225 Difference]: With dead ends: 1533 [2022-07-20 04:50:34,386 INFO L226 Difference]: Without dead ends: 915 [2022-07-20 04:50:34,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 04:50:34,388 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 220 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:34,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1061 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 04:50:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-07-20 04:50:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 813. [2022-07-20 04:50:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 787 states have (on average 1.2617534942820838) internal successors, (993), 792 states have internal predecessors, (993), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 04:50:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1036 transitions. [2022-07-20 04:50:34,409 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1036 transitions. Word has length 163 [2022-07-20 04:50:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:34,409 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1036 transitions. [2022-07-20 04:50:34,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 04:50:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1036 transitions. [2022-07-20 04:50:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-07-20 04:50:34,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:34,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:34,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 04:50:34,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:34,632 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:34,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1090168527, now seen corresponding path program 1 times [2022-07-20 04:50:34,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:34,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67616280] [2022-07-20 04:50:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:34,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:34,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:34,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699614406] [2022-07-20 04:50:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:34,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:34,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:34,695 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:34,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 04:50:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 04:50:35,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 04:50:35,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 04:50:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 04:50:35,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 04:50:35,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 04:50:35,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67616280] [2022-07-20 04:50:35,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 04:50:35,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699614406] [2022-07-20 04:50:35,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699614406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 04:50:35,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 04:50:35,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 04:50:35,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105691177] [2022-07-20 04:50:35,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 04:50:35,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 04:50:35,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 04:50:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 04:50:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 04:50:35,983 INFO L87 Difference]: Start difference. First operand 813 states and 1036 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 04:50:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 04:50:36,733 INFO L93 Difference]: Finished difference Result 1342 states and 1716 transitions. [2022-07-20 04:50:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 04:50:36,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 178 [2022-07-20 04:50:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 04:50:36,738 INFO L225 Difference]: With dead ends: 1342 [2022-07-20 04:50:36,738 INFO L226 Difference]: Without dead ends: 665 [2022-07-20 04:50:36,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 04:50:36,741 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 835 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 04:50:36,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 639 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 04:50:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-20 04:50:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-07-20 04:50:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 644 states have (on average 1.2468944099378882) internal successors, (803), 649 states have internal predecessors, (803), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 04:50:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 836 transitions. [2022-07-20 04:50:36,756 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 836 transitions. Word has length 178 [2022-07-20 04:50:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 04:50:36,756 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 836 transitions. [2022-07-20 04:50:36,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 04:50:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 836 transitions. [2022-07-20 04:50:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-20 04:50:36,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 04:50:36,758 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 04:50:36,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 04:50:36,972 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,SelfDestructingSolverStorable11 [2022-07-20 04:50:36,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 04:50:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 04:50:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -559500548, now seen corresponding path program 1 times [2022-07-20 04:50:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 04:50:36,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952441378] [2022-07-20 04:50:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 04:50:37,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 04:50:37,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254170861] [2022-07-20 04:50:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 04:50:37,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 04:50:37,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 04:50:37,035 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 04:50:37,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process